Question

Suppose I have three octave scripts a.m, b.m, c.m, and two global variables x, y. Is it possible to define these global variables in such a way that they can be shared across scripts? For example in a separate include file?

More Generally, how do global variables in GNU octave work?

Answer 1

It seems you have to declare the variable global, and you also have to explicitly tell Octave that the variable you are referencing is in a different (global) scope.

in library.m

global x = 1;

in main.m

function ret = foo()
    global x;
    5 * x;
endfunction

foo() should return 5