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Re: is this a bug?


From: John W. Eaton
Subject: Re: is this a bug?
Date: Wed, 2 Jul 1997 09:07:13 -0500

On  2-Jul-1997, Mario Storti <address@hidden> wrote:

| Vu Nguyen-Cong <address@hidden> writes:
| 
| > The following is what I did with octave-2.0.8 on Linux
| > 
| > z = [
| >    1       0       0
| >    1       0       0
| >    0       1       0
| >    0       1       0
| >    0       0       1
| >    0       0       1
| > ];
| > 
| > z(:, any(z))
| > 
| > ans =
| > 
| >   1  1  1
| >   1  1  1
| >   0  0  0
| >   0  0  0
| >   0  0  0
| >   0  0  0
| > 
| > Vu Nguyen-Cong
| > address@hidden
| 
| I think it's OK. any(z) is [1 1 1] and Octave understands z(:,[1 1 1])
| as [z(:,1) z(:,1) z(:,1)].

If you set prefer_zero_one_indexing to 1, Octave will return the
original matrix for this example.  Is that what you were expecting?

The next major release of Octave will have a boolean type that will
eliminate this ambiguity and the need for the prefer_zero_one_indexing
variable.

jwe



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