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

Hello Friends,

I have a script file and a function file. My script file have a parameter which I want to be accessible to the function. For example:

%%SCRIPT FILE

I want to set global variables here, say, alpha, beta, gamma, to be accessible to myFunction

output = myFunction(x,y);

%%FUNCTION FILE

f =myFunction(U,V)

k1 = someFunction(alpha, U);
k2 = someFunction(beta, V);
k3 = someFunction(gamma, U*V');

end

How to get these globalVAriables which are alpha, beta, gamma in my SCRIPT file to myFunction?

Answer 1

[Walter Roberson]

%%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