Re: feval call to a subfunction fails when it is in a subfunction

[Ben Abbott]

On Sep 30, 2009, at 9:40 PM, Sidney Markowitz wrote:

> I'm new to using Octave and don't know if this is a bug in my code, a
> bug in Octave, or something wrong with my installed copy of Octave.
>
> The following code demonstrates the problem. The first feval, in the
> main function, works and the result is displayed. The other feval,
> inside the subfunction switchyard2, gets an error in line 9
>  error: feval: function `mysin' not found
>
> I am using Octave version 3.2.2 compiled on my Macbook under MacOS
> 10.6.1, downloaded and built from Macports. I put the following text  
> in
> a file named ./switchyard.m and invoked it in the Octave command  
> line by
> typing   switchyard(10)
>
> Do others get the same results? Is there a bug in my example code?  
> Is it
> a bug in Octave?
>
> function y = switchyard(x)
>    z = feval('mysin', x);
>    disp(z);
>    y = switchyard2(x);
>   return;
> endfunction
>
> function y = switchyard2(x)
>   y = feval('mysin', x);
>   return;
> endfunction
>
> function y= mysin(x)
>   y = sin(x);
>  return;
> endfunction


It appears that I'm getting the same.

octave-3.2.2:4> switchyard(pi)
 1.2246e-16
error: feval: function `mysin' not found
error: called from:
error:   /Users/bpabbott/switchyard.m at line 9, column 5
error:   /Users/bpabbott/switchyard.m at line 4, column 6

01 function y = switchyard(x)
02    z = feval('mysin', x);
03    disp(z);
04    y = switchyard2(x);
05   return;
06 endfunction
07
08 function y = switchyard2(x)
09   y = feval('mysin', x);
10   return;
11 endfunction
12
13 function y= mysin(x)
14   y = sin(x);
15  return;
16 endfunction

I'm also running Mac OS 10.6.

I'm presently building the developers sources, so I can't check them  
till tomorrow.

Ben