MATLAB: Assigning a vector to a function

function

I made a function that returns a vector as a response. I noticed that this vector is not 'stored' as I check the workspace. So I attempted to say A = FUNCTION(X,Y). But it returned 'ERROR USING FUNCTION. TOO MANY OUTPUT ARGUMENTS'.

I want to store the response given by the function in a vector so I can use it in the future. How do i do this?

Thanks

Best Answer

It seems that you have not defined your function properly.

In an m-file called myfun.m you write

 function A = myfun(X,Y)
 A = X + Y; % or whatever the function should compute

Then you call it using, e.g.,

 a = myfun(x,y);

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"Function definitions are not permitted in this context" happens if you try to put a function in the same file as a script. Functions can only go in the same file as other functions. If you have test code to invoke the function, then that test code should either be a function itself or should be in a different file.

MATLAB: How to make output of a function available to script without function call

The file "myfun.m" is missing the function keyword. It should look like

function f1 = myFun(X,Y)
  [f1,f2] = myFun2(X,Y);    %It calls myFun2

end

And myfun only returns f1, not both f1 and f2. If you want it to return both, you have to list both on the function line

function [f1, f2] = myFun(X,Y)
  [f1,f2] = myFun2(X,Y);    %It calls myFun2
end

The script "myscript.m" has an extra "end" at the end of the file. It's a script, not a function so it should not have an end. Actually functions don't even need "end" statements, and I never use them.

myscript.m should look like

% Script file contains:  
X = [1 2;  4 5;  6 7];
Y = [8 9;  10 11];
% Get only f1, not f1 and f2 from myFun1.
f1 = myFun1(X,Y); % Calling myFun1 from myScript
[f1,f2] = myFun2(X,Y)
f1 = X*Y;            % 3x2 matrix

f2 = pdist2(X,Y);    % 3x2 matrix

Note that myFun1() will not call myfun.m because it has a 1 at the end of it so you must have a myFun1.m file or else you'll get an error.

Best Answer

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