Re: global variables

[Bill Denney]

On Fri, 26 May 2006, address@hidden wrote:

> global DEGUB = 0;
>
> then, some functions later..
>
> ... = func1(...)
>    ... = func2(...)
>       isglobal("DEBUG")
>    (END func2)
> (END func1)
>
> the "isglobal("DEBUG")" statement will answer with 0.. should this not 
> be 1 ? Or isn't it possible to get some function calls deeper the global 
> variables?

Within any function that uses a global variable, you have to declare it 
global (so that it knows to look for it).  To do this, you would want to 
do something like:

function y = f1 (x)
  global x1;
  if isempty (x1)
    x1 = 1;
  endif
  x1
endfunction

function y = f2 (x)
  global x1;
  if isempty (x1)
    x1 = 2;
  endif
  x1
endfunction

when running f2 after f1, you should see something like

x1 = 1

If you run f1 after f2, you should see something like

x1 = 2

Hope this helps,

Bill

--
"Judging from last week's garbage, he had almost finished his cloning
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