what is the meaning of @ in matlab code?

Hi all,

i just downloaded a matlab function from some website and saw something strange

if ~isa(A, 'function_handle')
   AT = @(x) A'*x;
   A = @(x) A*x;
end

what is the meaning of @?

[Kobi Aflalo]

The link you sent is a general documentation Where is the explanation

[Stephen23]

Here:

https://www.mathworks.com/help/matlab/function-handles.html

Answer 1

[Girish babu P]

An anonymous function is like an inline function in traditional programming languages, defined within a single MATLAB statement. It consists of a single MATLAB expression and any number of input and output arguments.

You can define an anonymous function right at the MATLAB command line or within a function or script.

This way you can create simple functions without having to create a file for them.

The syntax for creating an anonymous function from an expression is

f = @(arglist)expression

https://www.tutorialspoint.com/matlab/matlab_functions.htm

[Guillaume]

"An anonymous function is like an inline function in traditional programming languages"

As far as I know the only other programming languages that formerly define inline functions are C and C++, and these are nothing like anonymous functions.

Many languages do have anonymous function and/or lambdas. They're usually more powerful than matlab's (allowing branching/assignment/multiple statements).

Unless all your anonymous function does is just call another function with multiple outputs, it is actually impossible to create an anonymous function with multiple outputs in matlab.

[Girish babu P]

f = @myfunction;

Now if you have a function like

function y = compSqure(x)
y = x.^2;
end

 f = @compSqure;
 a = 4;
 b = f(a)

will give

b = 16

1. https://www.mathworks.com/help/matlab/matlab_prog/creating-a-function-handle.html

https://www.mathworks.com/help/matlab/matlab_prog/anonymous-functions.html

plz gothrough this links.

[Guillaume]

I have no idea what point you're trying to make but note that you started talking about anonymous function, your new comment demonstrates function handles which are not the same as anonymous functions (despite both using the symbol @)

Answer 2

[Satish Shenkar]

how to matrix multiplication