[Numpy-discussion] Matlab page on scipy wiki

Bill Baxter wbaxter at gmail.com
Thu Feb 9 17:10:37 CST 2006


For what it's worth, matlab's rank function just calls svd, and returns the
number singular values greater than a tolerance.  The implementation is a
whopping 5 lines long.

On 2/10/06, Fernando Perez <Fernando.Perez at colorado.edu> wrote:
>
> Since numpy is a n-dimensional array package, it may be convenient to
> introduce a matrix_rank() routine which does what matlab's rank() for 2-d
> arrays and matrices, while raising an error for any other shape.  This
> would
> also make it explicit that this operation is only well-defined for 2-d
> objects.


Or put it in numpy.linalg, which also makes it pretty clear what the scope
is.

--bb
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