diagonal & permutation matrices

[Jaroslav Hajek]

On Sun, Nov 16, 2008 at 3:16 PM, Thorsten Meyer <thorsten.meyier at gmx.de> wrote:
> Jaroslav Hajek wrote:
>> I've run into two issues:
>>
>> 1. What to do when printing/saving? To honor Matlab compatibility, we
>> should display & save them as full matrices. However, it is certainly
>> much more informational to print them specially, and seems a little
>> bit weird for Octave to cripple its own data when saving variables.
> The default file format for saving is still octave's own ascii format.
> Isn't that incompatible anyway? And would there be any way of saving such
> special matrices in matlab's binary format without  breaking compatibility?
>
> Does octave's display need to be compatible (or is it at the moment?)? How
> would you display a diagonal or permutation matrix?
>
> Thorsten
>
>

I was thinking about something like

ans =
Diagonal Matrix (10 by 10)
0.1
0.2
0.3
...

ans =
Row Permutation Matrix (10 by 10)
1
3
2
5
4
7
6
9
8
10

or maybe row vectors instead of column vectors...



-- 
RNDr. Jaroslav Hajek
computing expert
Aeronautical Research and Test Institute (VZLU)
Prague, Czech Republic
url: www.highegg.matfyz.cz