MATLAB: How to referrence a value (matrix) from script file to a function file

cross referrence from function file to script file

I have a function file that has a subroutine.

When I run the subroutine I want to then reference a value from the script file when running the function file.

eg.

val = 5 (in script file)

that script file runs the function file

said function file then references val from the script file.

Best Answer

The point of functions is to have their own scope and workspace so you pass in the things you need as input arguments.

If you script runs your function then it can just pass the relevant value down to the function as an argument.

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MATLAB: Calling Subroutine / Script file

Justin - if you have defined your subroutine as a function (or a script) then you can call it as is from within the body of the separate m file. For example, if the signature of your subroutine is something like

 function [out] = mySubroutine(input)

is saved to a file named mySubroutine.m, then you can call this function from within the body of your other m file as

 % do some stuff
 % call mySubroutine
 out = mySubroutine(input);

The above is an example only with one input and one output. I suspect that your function signature will be different.

MATLAB: How to declare global variables in a script file which are accessible to a function file

%%SCRIPT FILE
global alpha beta gamma
alpha = 57; beta = -343.8; gamma = arcsin(4323.1);    %initialize them

and in the function

global alpha beta gamma

before you refer to them.

However, using global variables is not recommended. You should pass the values to the function instead.

http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.28s.29.3F

Best Answer

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MATLAB: Calling Subroutine / Script file

MATLAB: How to declare global variables in a script file which are accessible to a function file

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