[Numpy-discussion] Matlab page on scipy wiki
Alan G Isaac
aisaac at american.edu
Thu Feb 9 06:39:11 CST 2006
On Thu, 9 Feb 2006, Bruce Southey apparently wrote:
> The example of ndim to give the rank is not the same as the Matlab
> function rank(a). See
> http://en.wikipedia.org/wiki/Rank_of_a_matrix for definition of rank
> that I would think that most people would use if they use Matlab
Coming from GAUSS and having never studies tensors, I was
also surprised by the 'rank' terminology. I believe this is
why Travis changed to ndim, which is less likely to confuse
users coming from a linear algebra perspective.
Unfortunately the SciPy book currently uses the term 'rank'
in the two conflicting ways. (It uses 'rank' in the linear
algebra sense only in the discussion of lstsq on p.145.)
It might be helpful for the tensor sense to always be
qualified as 'tensor rank'?
Cheers,
Alan Isaac
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