Calling a function in MATLAB

How can I call a function written in an .m file?

Answer 1

[Stephen23]

To call a function or a script, just write its name with the necessary inputs:

my_function(...)

Or

my_script

This works in the command window, or within another function or script.

You might like to revise the differences between scripts and functions in MATLAB, as these have very different properties! You also have to ensure that the called function can be found by MATLAB, which means it must be on the search path .

[user06]

actually i have written a function in a diff file ok now i need to call that function from a different file. then how to do that?

[Stephen23]

Your two functions are in two different Mfiles. If these are functions you should ensure that the function and Mfile names are the same. Then you can simply call one function from the other one (assuming that they are both on the MATLAB search path). If this is one function:

function y = my_square(x)
% square a number
y = x.^2;
end

then we can simply call it in another function like this:

function out = my_fun
a = 3;
out = my_square(a); % <- call the other function
end

Answer 2

[Aicha Ibtissem]

Hello, I cant call my function, I have this error.THANKS

Error<<Execution of script myplotfunction1 as a function is not supported:

C:\Users\fadel\Documents\MATLAB\myplotfunction1.m>>

clear all;
clc; 
function myplotfunction(equation)
x=linspace(-10,10,100);
y=eval(equation);
figure;
plot(x,y,'lineWidth',2)
title(['Représentation graphique de la fonction : ' equation]);
xlabel('x');
ylabel('y');
grid on;
end

[Steven Lord]

Delete these two lines from your file. They make your file a script file, not a function file, and you can't call a script with input arguments like you call a function.

clear all;
clc; 

[Walter Roberson]

The

clear all
clc;

makes that into a script. Get rid of those.