passing arguments between function files

Anyone know how to allow multiple files as input for one function file?

[Jan]

Please explain any details of your problem.

[anna]

not going to explain this very well but;I have 2 function files, call them funcX, funcY which have as output 2 parameters, X and Y and I want them to be read by a third function file funcZ as input to form say, Z from those X and Y. What syntax should I use to pass them in those 3 files?

[Jan]

Do you mean something like: Z = max(sin(0.2), cos(0.3))? max, sin and cos are functions also.

Usually it helps to understand the problem, if you post, what you have tried so far.

[Walter Roberson]

(No obvious reason to close this question, but one of the Answers should be Accepted.)

Answer 1

[Image Analyst]

% Define a function to take mulitple filenames and return multiple outputs.
function [output1 output2 output3] = yourFunction(filename1, filename2, filename3)

[anna]

thanks! that seemed to help somehow but not completely...

[Image Analyst]

Why not? That's how you define a function to take multiple inputs and return multiple outputs. You call it almost the same way, just don't use the function word:

% Call the function.
[output1 output2 output3] = yourFunction(filename1, filename2, filename3);

[anna]

thank you! and sorry, no, you're right, I know that much. i just didnt explain my question well. what I meant was that i have 2 separate function files that have as output X and Y and I want them to both be passed into a new function file, funcZ. how should i both call and define the function?

[Image Analyst]

If funcx and funcy both return an x and a y, how about

[x1 y1] = funcx();
[x2 y2] = funcy();
zOutput = funcz(x1, y1, x2, y2);

or using an alternate interpretation of your wording:

x = funcx();
y = funcy();
zOutput = funcz(x, y);

(This is what Walter said except that I'm capturing the outputs into arrays in the main program first before I pass them into funcz.)

Answer 2

[Walter Roberson]

Z = funcZ( funcX(), funcY() );
disp(Z);

function Z = funcZ( X, Y )
  Z = .... appropriate code ...
end

function X = funcX()
  X = .... appropriate code ...
end

function Y = funcY()
  Y = .... appropriate code ...
end

[anna]

Thanks!this seems the closest to what I wanted...but in which file should I put each line of code? its giving me an error for Z = funcZ( funcX(), funcY() ); which im putting in files funcX and funcY. should it not be Z = funcZ( funcX(X), funcY(Y) )?

this: function Z = funcZ( X, Y ) Z = .... appropriate code ... end i have in funcZ.

[Walter Roberson]

You said that X is an output of funcX and Y is an output of funcY, so you should not be passing X or Y into funcX and funcY

Put the following into testfuncZ.m :

Z = funcZ( funcX(), funcY() );
disp(Z);

Then put the funcZ code into funcZ.m and the funcX code into funcX.m and the funcY code into funcY.m . Invoke it all by giving the command

testfuncZ