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# How to Define And Call A Function In MATLAB?

In MATLAB, a function is a group of statements that together perform a specific task. To define a function in MATLAB, you need to create a new script file and write the function with the following syntax:

function output = functionName(input1, input2) % function body output = result;

In this syntax, "function" keyword is used to specify that a function is being defined. "output" is the variable that will store the result of the function, and "functionName" is the name of the function. "input1" and "input2" are the input arguments to the function.

To call a function in MATLAB, you simply need to type the function name followed by parentheses and any required input arguments. For example, if you have defined a function called "myFunction" that takes two input arguments, you can call it like this:

result = myFunction(input1, input2);

This will execute the function and store the result in the variable "results". You can then use this result in the rest of your MATLAB code.

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## How to specify outputs for a function in MATLAB?

In MATLAB, you can specify multiple outputs for a function by using square brackets [] to enclose the output variables in the function definition. Here is an example:

 ```1 2 3 4 5 ``` ```function [output1, output2] = myFunction(input1, input2) % Function body output1 = input1 + input2; output2 = input1 * input2; end ```

In this example, the function `myFunction` takes two input arguments `input1` and `input2`, and returns two output variables `output1` and `output2`. When you call the function, you can assign the outputs to separate variables like this:

 ```1 2 3 ``` ```[input1, input2] = myFunction(3, 4); disp(output1); % Output: 7 disp(output2); % Output: 12 ```

You can specify as many output variables as needed by separating them with commas inside the square brackets in the function definition.

## What is a function library in MATLAB?

A function library in MATLAB is a collection of pre-defined functions that can be used in MATLAB scripts or programs. These functions are typically organized into categories based on their functionality, making it easier for users to find and use the appropriate function for their specific needs. Function libraries in MATLAB can include a wide range of functions for tasks such as mathematical calculations, data analysis, signal processing, image processing, and more. These libraries can be created by MATLAB users or obtained from various sources such as the MATLAB File Exchange or MATLAB toolboxes.

## What is a function handle in MATLAB?

In MATLAB, a function handle is a data type that stores a reference to a function. Function handles can be used to call functions indirectly, pass functions as arguments to other functions, and create function aliases. They are denoted by using the "@" symbol followed by the function name.

For example, the following code creates a function handle for the built-in MATLAB function "sin" and then uses it to evaluate the sine of an input value:

 ```1 2 ``` ```f = @sin; result = f(0.5); ```

Function handles can also be used to create anonymous functions, which are small, unnamed functions that can be defined in a single line of code. This is useful for creating quick functions that are only needed for a specific task.

## What is an anonymous function in MATLAB?

An anonymous function in MATLAB is a function that does not require a file or a name to be defined. Instead, it is defined inline using the `@(arguments) expression` syntax. Anonymous functions are often used for simple calculations or as inputs to other functions.

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