Re: setdiff: Octave <-> Matlab

[Paul Kienzle]

Octave-forge has setdiff.  If you do some replacements:

    unique(x) -> unique(x,'rows')
    sort(x) -> sortrows(x)
    a(x)==b(y) -> all(a(x,:) == b(y,:),2)
    c(x) = [] -> c(x,:) = []

it should do what you need.

Please send a patch once you get it working, and once you have some 
test cases demonstrating it.  Some of the other set functions (e.g., 
intersect) also need extending to handle rows.

Thanks,

        - Paul

On Jun 14, 2005, at 2:10 PM, address@hidden wrote:

> I am tying to use the setdiff command in octave.  I am trying to get a 
> script that works in Matlab to work in octave.  In matlab the syntax 
> is:
>
> c = setdiff(A, B, 'rows'), when A and B are matrices with the same 
> number of columns, returns the rows from A that are not in B.
>
> in octave the syntax is similar, but it does not take the rows option. 
>  Not knowing exactly how Matlab works(I do not have a working copy) I 
> do not know how to get they same output in octave.  Can someone help 
> who has a copy of Matlab??
>
> Thanks!!
>
> Lou
>
>
>
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Octave is freely available under the terms of the GNU GPL.

Octave's home on the web:  http://www.octave.org
How to fund new projects:  http://www.octave.org/funding.html
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