# Call different functions inside a function

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Gonzalo Guerrero on 7 Nov 2022
Answered: Gonzalo Guerrero on 10 Nov 2022
HI there,
I am trying something I haven't done before, but I would like to learn how to do it, so I get a bit more experiences in it.
So, I have scripts that are very long, with few functions in it, and then I got other scripts that have functions that could help in different cases. So, I have decided that I want to create small functions that do small things, then create a main function that call those functions and import the data for the next function to work.
script1.m
function w=script1(a)
w=x
end
script2.m
function s=script2(w)
s=m
end
script3.m
function g=script3(w)
g=f
end
From those I would like to create a main function
mainscript.m
function mainscript()
script1
(gives back w)
script2
(gives back s)
script3.m
(gives back g)
end
any help will be appreciated!
Thank you,
Gonzalo

Davide Masiello on 7 Nov 2022
Edited: Davide Masiello on 7 Nov 2022
The way you have explained it in your question is already correct.
See the example below.
%% Main script
mainfunction
ans = 4
ans = 3
ans = 1.4142
%% Main function
function mainfunction()
myfun1(2)
myfun2(2)
myfun3(2)
end
%% Function 1 script
function out = myfun1(x)
out = x.^2;
end
%% Function 2 script
function out = myfun2(x)
out = x+1;
end
%% Function 3 script
function out = myfun3(x)
out = sqrt(x);
end
Steven Lord on 7 Nov 2022
If you want to use the output from myfun1, myfun2, myfun3 you need to call them with output arguments and pass those output arguments into the next function.
%% Main script
outputFromMainFunction = mainfunction
a = 4
banana = 5
c123 = 2.2361
outputFromMainFunction = 2.2361
%% Main function
function c123 = mainfunction()
a = myfun1(2)
Because I've omitted the semicolon at the end of these lines, MATLAB will print each output argument as it computes them. End the lines where you call myfun1, myfun2, and myfun3 with a semicolon if you want to suppress this display.
banana = myfun2(a)
c123 = myfun3(banana)
end
%% Function 1 script
function out = myfun1(x)
out = x.^2;
end
%% Function 2 script
function out = myfun2(x)
out = x+1;
end
%% Function 3 script
function out = myfun3(x)
out = sqrt(x);
end

Gonzalo Guerrero on 10 Nov 2022
Thank you guys!
I think i got the hang of it now! :D
cheers,
Gonz