User defined Functions in MATLAB Part 1

Nov 30, 2016Download as PPTX, PDF2 likes3,077 views

User-defined functions are similar to the MATLAB pre-defined functions. A function is a MATLAB program that can accept inputs and produce outputs. A function can be called or executed by another program or function. Code for a function is done in an Editor window or any text editor same way as script and saved as m-file. The m-file must have the same name as the function.

User Defined
Functions in MATLAB
Part 1
Shameer A Koya
1

Introduction
O User-defined functions are similar to the
MATLAB pre-defined functions
O A function is a MATLAB program that can accept
inputs and produce outputs.
O A function can be called or executed by another
program or function.
O Code for a function is done in an Editor window
or any text editor same way as script and saved
as m-file.
O The m-file must have the same name as the
function.
2

Introduction…
OThe convention for naming functions is the
same as for variables.
OIt is important that you give meaningful
variable names to variables inside a function
that you write, so that you and others can
understand what the function does.
OThe function M-file must be saved in your
current directory (otherwise it must be in the
path)
3

Why use functions?
OFunctions provide reusable code
OUse same code in more than one place in
program without rewriting code
OReuse code by calling in different programs
OMake debugging easier
4

Before you start …
OIdentify the function
ODecide the function name
ODecide the input variables
ODecide the output variables
OFile name must be the function name.
5

Function Syntax
function[a, b, c]= basicmath(x,y)
%BASICMATH Basic Mathematical function
% basicmath(x,y) is a sample matlabfunction to perform
% basic mathematical operations on input variables x & y
% outputs of the function are sum, difference and product
% of input arguments.
a = x + y;
b = x – y;
c = x * y;
6
Output arguments
Executable code
Comments about
the function
Name of the function
Input arguments
declaration
statement

Syntax …
O The declaration statement function is used to define the
file as a function.
O It must be typed in lower case letters.
O Input arguments
O Typed in side the parentheses ( )
O Used to transfer data into function from calling program.
O Can be zero or more input arguments.
O Output arguments
O Types inside the square brackets [ ]
O Used to transfer data out of function to calling program.
O Can be zero or more output arguments.
O Give a meaningful variable name.
O Rules for giving function name is same as the rules for
variable names.
7

More on Function Arguments
O Functions have private workspaces
O Variables that are created inside of a user-defined
function are referred to as local variables.
O They can only be accessed from inside of that
function.
O After the function completes its operations, the
local variables are deleted from memory.
O The only variable that appears in the workspace
is the output of the function.
O Conversely, functions cannot access variables
from the workspace. (with the exception of any input
parameters they might have or “global variables”---see MATLAB
help on this matter).

- Functions in MATLAB start with the keyword 'function' followed by output arguments, a valid function name, and optional input arguments. For example, function p=prime_num(a,b). - A function can return multiple values using square brackets around the output arguments. For example, function [o1,o2]=myfunction(a,b,c) returns two outputs. - To call a function, type its name and pass any required arguments in the command window. Returned values can be stored in variables or displayed directly without semicolons.

Matlab matrices and arraysAmeen San

This document discusses matrices and arrays in MATLAB. It defines matrices and vectors, and notes that MATLAB treats all variables as matrices. It explains how to enter matrices in MATLAB by listing elements separated by commas and semicolons. It also discusses built-in functions to generate matrices filled with zeros, ones, random values, or an identity matrix. The document covers operations on matrices like addition, subtraction, and multiplication. It explains how to extract sub-matrices and elements using indexing and introduces the colon operator.

Bisection methodMd. Mujahid Islam

The document discusses the bisection method for finding roots of equations. It begins by defining the bisection method as a root finding technique that repeatedly bisects an interval and selects a subinterval containing the root. It notes that while simple and robust, the bisection method converges slowly. The document then provides the step-by-step algorithm for implementing the bisection method and works through an example of finding the root of f(x) = x^2 - 2 between 1 and 2. It concludes by presenting the bisection method code in C++.

Introduction to MATLABAshish Meshram

Here are some basic MATLAB functions: - Trigonometric functions like sin, cos, tan - Exponential functions like exp, log - Complex functions like abs, conj - Discrete math functions like factorial - Matrix functions like det help provides documentation on functions. Minimal MATLAB 13 Computing with MATLAB Basic Operations Assignment Operator = Relational Operators == ~= < <= > >= Logical Operators & | ~ && || Elementwise Operators .^ .\ ./ .' .' Special Operators : ; ' () {} []

Introduction to matlabTarun Gehlot

This document provides an introduction and overview of Matlab. It outlines the main Matlab screen components, discusses variables, arrays, matrices and indexing. It also covers basic operators, plotting functions, flow control, using M-files and writing user-defined functions. The key topics covered in 3 sentences or less are: Matlab allows matrix operations and plotting, has variables without types, and functions can be defined and saved in M-files to be called from the command window or other code.

Matlab FunctionsUmer Azeem

This document discusses functions in MATLAB. It defines a function as a group of statements that perform a task and can accept inputs and produce outputs. Functions provide reusable code and can accept multiple input arguments and return multiple output arguments. There are built-in MATLAB functions and user-defined functions. Built-in functions include basic math, trigonometric, data analysis, and other functions. User-defined functions are created by the user and must have the same name as the file. They are defined using the function keyword and can return single or multiple outputs. Functions are called from the command window by specifying their name and valid inputs.

07. Virtual FunctionsHaresh Jaiswal

User defined functions in CHarendra Singh

INLINE FUNCTION IN C++Vraj Patel

MATLAB Basics-Part1Elaf A.Saeed

Matlab is basically a high level language which has many specialized toolboxes for making things easier for us. Matlab stands for MATrix LABoratory. The first version of MATLAB was produced in the mid 1970s as a teaching tool. MATLAB started as an interactive program for doing matrix calculations. MATLAB has now grown to a high level mathematical language that can solve integrals and differential equations numerically and plot a wide variety of two and three Dimensional graphs. The expanded MATLAB is now used for calculations and simulation in companies and government labs ranging from aerospace, car design, signal analysis through to instrument control and financial analysis. In practice, it provides a very nice tool to implement numerical method. - The desktop includes these panels: Current Folder — Access your files. Command Window — Enter commands at the command line, indicated by the prompt (>>). Workspace — Explore data that you create or import from files. - what we learn: 1- Introduction to Matlab. 2- MATLAB InstallationVersion 2018. 3- Assignment. 4- Operations in MATLAB. 5- Vectors and Matrices in MATLAB.

Function in C programNurul Zakiah Zamri Tan

Introduction to matlab lecture 1 of 4Randa Elanwar

Class and object in C++rprajat007

This document discusses classes and objects in C++. It defines a class as a user-defined data type that implements an abstract object by combining data members and member functions. Data members are called data fields and member functions are called methods. An abstract data type separates logical properties from implementation details and supports data abstraction, encapsulation, and hiding. Common examples of abstract data types include Boolean, integer, array, stack, queue, and tree structures. The document goes on to describe class definitions, access specifiers, static members, and how to define and access class members and methods.

Trees Gaditek

This document discusses trees and their applications in discrete mathematics. It begins with an introduction to trees, including defining different types of trees such as rooted trees, m-ary trees, and binary trees. It then covers applications of trees such as binary search trees, decision trees, and game trees. Next, it discusses different tree traversal algorithms like preorder, inorder, and postorder traversal and how they can be used to represent expressions. Finally, it provides examples of evaluating expressions represented as trees.

Mathematical foundations of computer scienceBindhuBhargaviTalasi

- The document discusses the mathematical foundations of computer science, including topics like mathematical logic, set theory, algebraic structures, and graph theory. - It specifically focuses on mathematical logic, defining statements, atomic and compound statements, and various logical connectives like negation, conjunction, disjunction, implication, biconditional, and their truth tables. - It also discusses logical concepts like tautologies, contradictions, contingencies, logical equivalence, and tautological implication through the use of truth tables and logical formulas.

Functions in c++Rokonuzzaman Rony

Call by value or call by reference in C++Sachin Yadav

Functions in CKamal Acharya

This document discusses different types of functions in C programming. It defines library functions, user-defined functions, and the key elements of functions like prototypes, arguments, parameters, return values. It categorizes functions based on whether they have arguments and return values. The document also explains how functions are called, either by value where changes are not reflected back or by reference where the original values are changed.

virtual functionVENNILAV6

Virtual functions allow functions to be overridden in derived classes. The virtual keyword before a function in the base class specifies that the function can be overridden. When a virtual function is called using a base class pointer, the version from the most derived class will be executed due to late binding. This allows runtime polymorphism where the function call is resolved based on the actual object type rather than the pointer variable type.

Matlab Introductionideas2ignite

Passing an Array to a Function (ICT Programming)Fatima Kate Tanay

Arrays passed to functions are passed by reference, not by value. When an array is passed to a function, the function receives the address of the first element. Any modifications made to the array elements inside the function are reflected in the original array in memory. Arrays do not need an ampersand (&) when passed to a function. The function prototype only needs to specify the array name without brackets to indicate an array parameter.

Polymorphism in C++Rabin BK

This document discusses polymorphism in C++. It defines static polymorphism as function overloading and overriding, where functions can have the same name but different parameters. Dynamic polymorphism uses virtual functions and runtime binding via pointers. Virtual functions allow overriding in derived classes. Pure virtual functions make a class abstract, requiring implementation in derived classes. Interface classes are like abstract classes but inheritance is not required.

Inline function in C++Learn By Watch

The document discusses inline functions in C++. It explains that inline functions are replaced by their function code during compilation so they run faster than regular functions but use more memory. It provides examples of declaring and defining inline functions and demonstrates how an inline function call is handled at runtime by replacing it with the function statements. The document also discusses making member functions inline within a class declaration.

Newton's forward & backward interpolationHarshad Koshti

Newton's forward and backward interpolation are methods for estimating the value of a function between known data points. Newton's forward interpolation uses a formula to calculate successive differences between the y-values of known x-values to estimate y-values for unknown x-values greater than the last known x-value. Newton's backward interpolation similarly uses differences but to estimate y-values for unknown x-values less than the first known x-value. The document provides an example of using Newton's forward formula to find the estimated y-value of 0.5 given a table of x and y pairs, calculating the differences and plugging into the formula. It also works through an example of Newton's backward interpolation to estimate the y-value at

Hasse diagramshresthadnes

The document defines and provides examples of Hasse diagrams. A Hasse diagram is a type of graph used to represent partially ordered sets. It draws elements with edges between them if one element covers another. The document gives an example Hasse diagram and explains that it shows the relations between elements in a partially ordered set with edges between elements if one is directly above the other in the order.

Matlab pptchestialtaff

MATLAB is a numerical computing environment and programming language. It allows matrix manipulations, plotting of functions and data, implementation of algorithms, and interfacing with programs in other languages. MATLAB can be used for applications like signal processing, image processing, control systems, and computational finance. It offers advantages like ease of use, platform independence, and predefined functions. However, it can sometimes be slow and is commercial software. The MATLAB interface includes a command window, current directory, workspace, and command history. Arrays are fundamental data types in MATLAB and can be vectors, matrices, or multidimensional. Variables are used to store information in the workspace and can represent different data types. Common operations include arithmetic, functions, and following the

Functions in C++Nikhil Pandit

User Defined Functions in MATLAB part 2Shameer Ahmed Koya

Previous post we discussed what is a user defined function in MATLAB. This lecture we will discuss how to define a function and how to call the function in a script. Components of a function is discussed in the previous lecture. The first statement in a function must be function definition.The basic syntax of a function definition is: function[a, b, c]= basicmath(x,y) Basically a function accepts an input vector, perform the operation, and returns a result. The sample function given has two input variables and three output variables. But we can also have functions without input or/and output.

MATLAB Programming - Loop Control Part 2Shameer Ahmed Koya

More Related Content

What's hot (20)

User defined functions in CHarendra Singh

INLINE FUNCTION IN C++Vraj Patel

MATLAB Basics-Part1Elaf A.Saeed

Function in C programNurul Zakiah Zamri Tan

Introduction to matlab lecture 1 of 4Randa Elanwar

Class and object in C++rprajat007

Trees Gaditek

Mathematical foundations of computer scienceBindhuBhargaviTalasi

Functions in c++Rokonuzzaman Rony

Call by value or call by reference in C++Sachin Yadav

Functions in CKamal Acharya

virtual functionVENNILAV6

Matlab Introductionideas2ignite

Passing an Array to a Function (ICT Programming)Fatima Kate Tanay

Polymorphism in C++Rabin BK

Inline function in C++Learn By Watch

Newton's forward & backward interpolationHarshad Koshti

Hasse diagramshresthadnes

Matlab pptchestialtaff

Functions in C++Nikhil Pandit

User defined functions in CHarendra Singh

INLINE FUNCTION IN C++Vraj Patel

MATLAB Basics-Part1Elaf A.Saeed

Function in C programNurul Zakiah Zamri Tan

Introduction to matlab lecture 1 of 4Randa Elanwar

Class and object in C++rprajat007

Trees Gaditek

Mathematical foundations of computer scienceBindhuBhargaviTalasi

Functions in c++Rokonuzzaman Rony

Call by value or call by reference in C++Sachin Yadav

Functions in CKamal Acharya

virtual functionVENNILAV6

Matlab Introductionideas2ignite

Passing an Array to a Function (ICT Programming)Fatima Kate Tanay

Polymorphism in C++Rabin BK

Inline function in C++Learn By Watch

Newton's forward & backward interpolationHarshad Koshti

Hasse diagramshresthadnes

Matlab pptchestialtaff

Functions in C++Nikhil Pandit

Viewers also liked (20)

User Defined Functions in MATLAB part 2Shameer Ahmed Koya

MATLAB Programming - Loop Control Part 2Shameer Ahmed Koya

User Defined Functions in MATLAB Part-4Shameer Ahmed Koya

A MATLAB function that accepts another function as an input is called a function function. Function handles are used for passing functions to function functions. Syntax for function function is same as simple functions, but one or more input arguments will be function handles. Multiple functions within one function file is called local function. Name of function file should be name of main function. Main function can be called from the command window or any other function. Local functions are typed in any order after the main function. Local functions are only visible to other functions in the same file. A private function is a function residing in a sub directory with the name private. Private functions are visible only to functions in the parent directory.

Introduction to Matlab ScriptsShameer Ahmed Koya

MATLAB Script or programs are sequences of MATLAB commands saved in plain text files. When you type the name of the script file at the MATLAB prompt the commands in the script file are executed as if you had typed them in command window. Code for a script is done in an Editor window and saved as m-file. In case your code has errors, MATLAB will show an error message in the command window, when you try to run the program . Error message will be hyperlinked to the line in the file that caused the error.

Anonymous and Inline Functions in MATLABShameer Ahmed Koya

MATLAB's anonymous functions provide an easy way to specify a function. An anonymous function is a function defined without using a separate function file. It is a MATLAB feature that lets you define a mathematical expression of one or more inputs and either assign that expression to a function. This method is good for relatively simple functions that will not be used that often and that can be written in a single expression. The inline command lets you create a function of any number of variables by giving a string containing the function followed by a series of strings denoting the order of the input variables. It is similar to an Anonymous Function

Conditional Control in MATLAB ScriptsShameer Ahmed Koya

In this lecture we discuss more about programming in MATLAB. One main section in programming is flow control. There are many flow control commands in MATLAB. In this lecture we discuss the conditional flow control commands. Conditional statements are commands that allows MATLAB to decide whether or not to execute some code that follows the statement Conditional statements use relational operators like ==,~=,>,< (Note that are all scalar tests)

Matlab time series exampleOvie Uddin Ovie Uddin

This document describes using MATLAB to analyze a synthetic time series dataset representing climate data over 500,000 years. The time series contains periodic signals at 100ky, 41ky and 21ky. Random noise and a long term trend are added. Fourier analysis is used to identify the dominant periodic components in the frequency domain. A Hamming window and bandpass filter are applied to further analyze specific frequency bands like the 21ky signal. Autocorrelation is also examined to identify cyclic patterns in the time series.

Loops in matlabTUOS-Sam

Matlab Script - Loop ControlShameer Ahmed Koya

MATLAB Scripts - ExamplesShameer Ahmed Koya

Matlab solving rlc circuitAmeen San

This document discusses solving RLC series parallel circuits using Simulink. It introduces Kirchhoff's voltage law and differentiating the voltage equations to express the RLC response in general form. It provides a Simulink model for a series RLC circuit and instructs the reader to change component values and make a parallel RLC model. It also introduces the SimPowerSystems library for modeling electrical systems in Simulink and lists some commonly used blocks with an example circuit.

CIV1900 Matlab - Plotting & CourseworkTUOS-Sam

This document provides an overview of plotting and image processing capabilities in Matlab. It discusses how to generate basic scatter plots and customize axis properties. It also explains how digital images are constructed as arrays and can be displayed, rotated, and converted to grayscale using commands like plot, surf, image, and imagesc. The document demonstrates plotting multiple lines and images on the same figure. It describes how image processing techniques like Sobel filtering can be used to detect edges in an image.

MATLAB programming tips 2 - Input and Output CommandsShameer Ahmed Koya

This document provides an overview of several Matlab commands for input/output: 1) The input command prompts the user to enter a value and stores it in a variable. The sscanf command reads data as a string and converts it to other formats. 2) The disp command displays variable values or text without variable names. The fprintf command formats and displays data on screen or writes it to a file with control over formatting. 3) The fprintf command uses formatting operators like %d, %f, and %s to control the display of different data types when combined with conversion characters.

R Programming: Numeric Functions In RRsquared Academy

Variables in matlabTUOS-Sam

This document provides an overview of variables, arrays, and other basic programming concepts in MATLAB. It discusses how variables store and retrieve values, how arrays can have multiple dimensions and elements can be accessed using indexing, and how basic operations can be performed on arrays element-wise or across entire arrays using functions. Various functions for creating arrays filled with zeros, ones, or random values are also introduced.

Mat lab workshopVinay Kumar

MATLAB is a high-level programming language and computing environment used for numerical computations, visualization, and programming. The document discusses MATLAB's capabilities including its toolboxes, plotting functions, control structures, M-files, and user-defined functions. MATLAB is useful for engineering and scientific calculations due to its matrix-based operations and built-in functions.

Matlab lec1Amba Research

This document provides a summary of a course on introduction to MATLAB. The course includes 7 lectures covering topics like variables, operations, plotting, visualization, programming, solving equations and advanced methods. It will have problem sets to be submitted after each lecture and requirements to pass include attending all lectures and completing all problem sets. The course materials provide an overview of MATLAB including getting started, creating and manipulating variables, and basic plotting.

metode numerik stepest descent dengan rerata aritmatikaSabarinsyah Piliang

Modul1 metode bagi dua Praktikum Metode NumerikJames Montolalu

MATLAB - Arrays and MatricesShameer Ahmed Koya

User Defined Functions in MATLAB part 2Shameer Ahmed Koya

MATLAB Programming - Loop Control Part 2Shameer Ahmed Koya

User Defined Functions in MATLAB Part-4Shameer Ahmed Koya

Introduction to Matlab ScriptsShameer Ahmed Koya

Anonymous and Inline Functions in MATLABShameer Ahmed Koya

Conditional Control in MATLAB ScriptsShameer Ahmed Koya

Matlab time series exampleOvie Uddin Ovie Uddin

Loops in matlabTUOS-Sam

Matlab Script - Loop ControlShameer Ahmed Koya

MATLAB Scripts - ExamplesShameer Ahmed Koya

Matlab solving rlc circuitAmeen San

CIV1900 Matlab - Plotting & CourseworkTUOS-Sam

MATLAB programming tips 2 - Input and Output CommandsShameer Ahmed Koya

R Programming: Numeric Functions In RRsquared Academy

Variables in matlabTUOS-Sam

Mat lab workshopVinay Kumar

Matlab lec1Amba Research

metode numerik stepest descent dengan rerata aritmatikaSabarinsyah Piliang

Modul1 metode bagi dua Praktikum Metode NumerikJames Montolalu

MATLAB - Arrays and MatricesShameer Ahmed Koya

Similar to User defined Functions in MATLAB Part 1 (20)

Learn more about the concepts Functions of PythonPrathamKandari

04. WORKING WITH FUNCTIONS-2 (1).pptxManas40552

Functions allow programmers to organize code into reusable units and divide large programs into smaller, more manageable parts. The document discusses key concepts related to functions in Python like defining and calling user-defined functions, passing arguments, scope, and recursion. It provides examples of different types of functions and how concepts like mutability impact parameter passing. Functions are a fundamental part of modular and readable program design.

functions notes.pdf python functions and oppKirtiGarg71

FUNCTION CPUKrushal Kakadia

This document discusses functions in C programming. It defines functions as a group of statements that perform a specific task and have a name. Main functions must be included in every C program as it is where program execution begins. Functions help facilitate modular programming by dividing programs into smaller parts. Functions can be user-defined or built-in library functions. Parameters can be passed to functions by value or by reference. Functions can call themselves through recursion. Variables have different storage classes like auto, register, static, and external that determine scope and lifetime.

Ch-5.pdfR.K.College of engg & Tech

This document discusses Python functions and modules. It explains that Python allows programmers to break programs into independent segments called functions. Functions enable easier understanding, coding, testing and maintenance of programs. The document covers function declaration, definition, calls, parameters, local and global variables, return statements, default arguments, anonymous functions, recursion and importing from modules.

Ch-5.pdfR.K.College of engg & Tech

This document discusses Python functions and modules. It explains that Python allows programmers to break programs into independent segments called functions. Functions enable easier understanding, coding, testing and maintenance of programs. The document then covers various aspects of defining, calling and using functions in Python like function declaration, parameters, local and global variables, return values, recursion and importing from modules.

functions.pptxKavithaChekuri3

The document defines and explains different types of functions in Python. It discusses defining functions, calling functions, passing arguments by reference versus value, writing functions using different approaches like anonymous functions and recursive functions. Some key points covered include: defining a function uses the def keyword followed by the function name and parameters; functions can be called by their name with arguments; arguments are passed by reference for mutable objects and by value for immutable objects; anonymous functions are defined using the lambda keyword and return a single expression; recursive functions call themselves to break down problems into sub-problems until a base case is reached.

3-Python Functions.pdf in simple.........mxdsnaps

function of C.pptxshivas379526

This document discusses different types of functions in C programming. It introduces library functions, user-defined functions, and the key elements of functions like function prototypes, arguments, parameters, return values, and function definitions. It also categorizes functions based on whether they have arguments and return values. Finally, it covers the different ways functions can be called, either by passing values or by passing references.

functions new.pptxbhuvanalakshmik2

The document discusses functions in Python. It introduces functions as a way to divide large programs into smaller, more manageable units called functions. Functions allow code to be reused by calling or invoking the function from different parts of a program. The document then covers key concepts related to functions like arguments, parameters, scope, recursion, and more. It provides examples to illustrate different types of functions and how concepts like scope, recursion, and argument passing work.

FunctionGauravGautam224100

Ch4 functionsHattori Sidek

The document introduces functions in C programming. It discusses defining and calling library functions and user-defined functions, passing arguments to functions, returning values from functions, and writing recursive functions. Functions allow breaking programs into modular and reusable units of code. Library functions perform common tasks like input/output and math operations. User-defined functions are created to perform specific tasks. Information is passed between functions via arguments and return values.

Functions and modular programming.pptxzueZ3

This document discusses functions and modular programming in C++. It defines what a function is and explains that functions allow dividing code into separate and reusable tasks. It covers function declarations, definitions, parameters, return types, and calling functions. It also discusses different ways of passing arguments to functions: call by value, call by pointer, and call by reference. Finally, it provides an example program that calculates addition and subtraction using different functions called within the main function. Modular programming is also summarized as dividing a program into independent and reusable modules to reduce complexity, decrease duplication, improve collaboration and testing.

Python functionsProf. Dr. K. Adisesha

Functions allow programmers to organize code into reusable blocks. A function is defined using the def keyword and can accept parameters. The body of a function contains a set of statements that run when the function is called. Functions can return values and allow code to be reused, reducing errors and improving readability. Parameters allow information to be passed into functions, while return values allow functions to provide results.

All chapters C++ - Copy.pdfytttttttttttttttttttttttttttttjacobdiriba

yesmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmklllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllljjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjyesmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmklllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllljjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjyesmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmklllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllljjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj

C functionsUniversity of Potsdam

User defined function in C.pptxRhishav Poudyal

User Defined Function in C - Functions modularize programs and allow for code reusability. Parameters allow communication between functions. - A function definition includes a return type, name, parameters, and block of statements. Functions are called within other functions. - Functions provide benefits like divide and conquer programming, manageable development, and abstraction that hides internal details.

ESIT135 Problem Solving Using Python Notes of Unit-2 and Unit-3prasadmutkule1

VIT351 Software Development VI Unit1YOGESH SINGH

Decided to go to the 65 and the value of the numberharshoberoi2050

Learn more about the concepts Functions of PythonPrathamKandari

04. WORKING WITH FUNCTIONS-2 (1).pptxManas40552

functions notes.pdf python functions and oppKirtiGarg71

FUNCTION CPUKrushal Kakadia

Ch-5.pdfR.K.College of engg & Tech

functions.pptxKavithaChekuri3

3-Python Functions.pdf in simple.........mxdsnaps

function of C.pptxshivas379526

functions new.pptxbhuvanalakshmik2

FunctionGauravGautam224100

Ch4 functionsHattori Sidek

Functions and modular programming.pptxzueZ3

Python functionsProf. Dr. K. Adisesha

All chapters C++ - Copy.pdfytttttttttttttttttttttttttttttjacobdiriba

C functionsUniversity of Potsdam

User defined function in C.pptxRhishav Poudyal

ESIT135 Problem Solving Using Python Notes of Unit-2 and Unit-3prasadmutkule1

VIT351 Software Development VI Unit1YOGESH SINGH

Decided to go to the 65 and the value of the numberharshoberoi2050

Recently uploaded (20)

YSPH VMOC Special Report - Measles Outbreak Southwest US 4-30-2025.pptxYale School of Public Health - The Virtual Medical Operations Center (VMOC)

A measles outbreak originating in West Texas has been linked to confirmed cases in New Mexico, with additional cases reported in Oklahoma and Kansas. The current case count is 795 from Texas, New Mexico, Oklahoma, and Kansas. 95 individuals have required hospitalization, and 3 deaths, 2 children in Texas and one adult in New Mexico. These fatalities mark the first measles-related deaths in the United States since 2015 and the first pediatric measles death since 2003. The YSPH Virtual Medical Operations Center Briefs (VMOC) were created as a service-learning project by faculty and graduate students at the Yale School of Public Health in response to the 2010 Haiti Earthquake. Each year, the VMOC Briefs are produced by students enrolled in Environmental Health Science Course 581 - Public Health Emergencies: Disaster Planning and Response. These briefs compile diverse information sources – including status reports, maps, news articles, and web content– into a single, easily digestible document that can be widely shared and used interactively. Key features of this report include: - Comprehensive Overview: Provides situation updates, maps, relevant news, and web resources. - Accessibility: Designed for easy reading, wide distribution, and interactive use. - Collaboration: The “unlocked" format enables other responders to share, copy, and adapt seamlessly. The students learn by doing, quickly discovering how and where to find critical information and presenting it in an easily understood manner.

The ever evoilving world of science /7th class science curiosity /samyans aca...Sandeep Swamy

The Ever-Evolving World of Science Welcome to Grade 7 Science4not just a textbook with facts, but an invitation to question, experiment, and explore the beautiful world we live in. From tiny cells inside a leaf to the movement of celestial bodies, from household materials to underground water flows, this journey will challenge your thinking and expand your knowledge. Notice something special about this book? The page numbers follow the playful flight of a butterfly and a soaring paper plane! Just as these objects take flight, learning soars when curiosity leads the way. Simple observations, like paper planes, have inspired scientific explorations throughout history.

Understanding P–N Junction Semiconductors: A Beginner’s GuideGS Virdi

Dive into the fundamentals of P–N junctions, the heart of every diode and semiconductor device. In this concise presentation, Dr. G.S. Virdi (Former Chief Scientist, CSIR-CEERI Pilani) covers: What Is a P–N Junction? Learn how P-type and N-type materials join to create a diode. Depletion Region & Biasing: See how forward and reverse bias shape the voltage–current behavior. V–I Characteristics: Understand the curve that defines diode operation. Real-World Uses: Discover common applications in rectifiers, signal clipping, and more. Ideal for electronics students, hobbyists, and engineers seeking a clear, practical introduction to P–N junction semiconductors.

Quality Contril Analysis of Containers.pdfDr. Bindiya Chauhan

Unit 6_Introduction_Phishing_Password Cracking.pdfKanchanPatil34

How to Manage Opening & Closing Controls in Odoo 17 POSCeline George

How to Customize Your Financial Reports & Tax Reports With Odoo 17 AccountingCeline George

World war-1(Causes & impacts at a glance) PPT by Simanchala Sarab(BABed,sem-4...larencebapu132

Exploring-Substances-Acidic-Basic-and-Neutral.pdfSandeep Swamy

Exploring Substances: Acidic, Basic, and Neutral Welcome to the fascinating world of acids and bases! Join siblings Ashwin and Keerthi as they explore the colorful world of substances at their school's National Science Day fair. Their adventure begins with a mysterious white paper that reveals hidden messages when sprayed with a special liquid. In this presentation, we'll discover how different substances can be classified as acidic, basic, or neutral. We'll explore natural indicators like litmus, red rose extract, and turmeric that help us identify these substances through color changes. We'll also learn about neutralization reactions and their applications in our daily lives. by sandeep swamy

SPRING FESTIVITIES - UK AND USA -Colégio Santa Teresinha

Presentation on Tourism Product Development By Md Shaifullar RabbiMd Shaifullar Rabbi

UNIT 3 NATIONAL HEALTH PROGRAMMEE. SOCIAL AND PREVENTIVE PHARMACYDR.PRISCILLA MARY J

Anti-Depressants pharmacology 1slide.pptxMayuri Chavan

Sinhala_Male_Names.pdf Sinhala_Male_Namekeshanf79

Odoo Inventory Rules and Routes v17 - Odoo SlidesCeline George

New Microsoft PowerPoint Presentation.pptxmilanasargsyan5

pulse ppt.pptx Types of pulse , characteristics of pulse , Alteration of pulsesushreesangita003

Niamh Lucey, Mary Dunne. Health Sciences Libraries Group (LAI). Lighting the ...Library Association of Ireland

Handling Multiple Choice Responses: Fortune Effiong.pptxAuthorAIDNationalRes

P-glycoprotein pamphlet: iteration 4 of 4 finalbs22n2s

YSPH VMOC Special Report - Measles Outbreak Southwest US 4-30-2025.pptxYale School of Public Health - The Virtual Medical Operations Center (VMOC)

The ever evoilving world of science /7th class science curiosity /samyans aca...Sandeep Swamy

Understanding P–N Junction Semiconductors: A Beginner’s GuideGS Virdi

Quality Contril Analysis of Containers.pdfDr. Bindiya Chauhan

Unit 6_Introduction_Phishing_Password Cracking.pdfKanchanPatil34

How to Manage Opening & Closing Controls in Odoo 17 POSCeline George

How to Customize Your Financial Reports & Tax Reports With Odoo 17 AccountingCeline George

World war-1(Causes & impacts at a glance) PPT by Simanchala Sarab(BABed,sem-4...larencebapu132

Exploring-Substances-Acidic-Basic-and-Neutral.pdfSandeep Swamy

SPRING FESTIVITIES - UK AND USA -Colégio Santa Teresinha

Presentation on Tourism Product Development By Md Shaifullar RabbiMd Shaifullar Rabbi

UNIT 3 NATIONAL HEALTH PROGRAMMEE. SOCIAL AND PREVENTIVE PHARMACYDR.PRISCILLA MARY J

Anti-Depressants pharmacology 1slide.pptxMayuri Chavan

Sinhala_Male_Names.pdf Sinhala_Male_Namekeshanf79

Odoo Inventory Rules and Routes v17 - Odoo SlidesCeline George

New Microsoft PowerPoint Presentation.pptxmilanasargsyan5

pulse ppt.pptx Types of pulse , characteristics of pulse , Alteration of pulsesushreesangita003

Niamh Lucey, Mary Dunne. Health Sciences Libraries Group (LAI). Lighting the ...Library Association of Ireland

Handling Multiple Choice Responses: Fortune Effiong.pptxAuthorAIDNationalRes

P-glycoprotein pamphlet: iteration 4 of 4 finalbs22n2s

User defined Functions in MATLAB Part 1

1. User Defined Functions in MATLAB Part 1 Shameer A Koya 1

2. Introduction O User-defined functions are similar to the MATLAB pre-defined functions O A function is a MATLAB program that can accept inputs and produce outputs. O A function can be called or executed by another program or function. O Code for a function is done in an Editor window or any text editor same way as script and saved as m-file. O The m-file must have the same name as the function. 2

3. Introduction… OThe convention for naming functions is the same as for variables. OIt is important that you give meaningful variable names to variables inside a function that you write, so that you and others can understand what the function does. OThe function M-file must be saved in your current directory (otherwise it must be in the path) 3

4. Why use functions? OFunctions provide reusable code OUse same code in more than one place in program without rewriting code OReuse code by calling in different programs OMake debugging easier 4

5. Before you start … OIdentify the function ODecide the function name ODecide the input variables ODecide the output variables OFile name must be the function name. 5

6. Function Syntax function[a, b, c]= basicmath(x,y) %BASICMATH Basic Mathematical function % basicmath(x,y) is a sample matlabfunction to perform % basic mathematical operations on input variables x & y % outputs of the function are sum, difference and product % of input arguments. a = x + y; b = x – y; c = x * y; 6 Output arguments Executable code Comments about the function Name of the function Input arguments declaration statement

7. Syntax … O The declaration statement function is used to define the file as a function. O It must be typed in lower case letters. O Input arguments O Typed in side the parentheses ( ) O Used to transfer data into function from calling program. O Can be zero or more input arguments. O Output arguments O Types inside the square brackets [ ] O Used to transfer data out of function to calling program. O Can be zero or more output arguments. O Give a meaningful variable name. O Rules for giving function name is same as the rules for variable names. 7

8. More on Function Arguments O Functions have private workspaces O Variables that are created inside of a user-defined function are referred to as local variables. O They can only be accessed from inside of that function. O After the function completes its operations, the local variables are deleted from memory. O The only variable that appears in the workspace is the output of the function. O Conversely, functions cannot access variables from the workspace. (with the exception of any input parameters they might have or “global variables”---see MATLAB help on this matter).

User defined Functions in MATLAB Part 1

Recommended

More Related Content

What's hot (20)

Viewers also liked (20)

Similar to User defined Functions in MATLAB Part 1 (20)

Recently uploaded (20)

User defined Functions in MATLAB Part 1