[Numpy-discussion] Matlab page on scipy wiki

Bill Baxter wbaxter at gmail.com
Thu Feb 9 16:02:15 CST 2006


Oh, yeh. I can see the problem with the phrase "rank of a matrix".  It does
sound like it means the linear algebra rank of rank/nullity fame.   I
changed the description on the page a bit.  Thanks for catching that.

--bb

On 2/9/06, Bruce Southey <bsouthey at gmail.com> wrote:
>
> Hi,
> 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 and
> is provided by rank(a).
>
> I have not used the latest numpy but the equivalent function is not
> present in numarray/Numeric (to my knowledge) so you have to find some
> other way like using svd.
>
> Regards
> Bruce
>
> On 2/9/06, Bill Baxter <wbaxter at gmail.com> wrote:
> > I added some content to the "NumPy/SciPy for Matlab users" page on the
> scipy wiki.
> >
> > But my knowledge of NumPy/SciPy isn't sufficient to fill in the whole
> chart of equivalents that I laid out.
> > If folks who know both could browse by and maybe fill in a blank or two,
> that would be great.  I think this will be a helpful "getting started" page
> for newbies to NumPy coming from matlab, like me.  One of the most
> frustrating things is when you sit down and can't figure out how to do the
> most basic things that do in your sleep in another environment (like making
> a column vector).  So hopefully this page will help.
> >
> > The URL is : http://www.scipy.org/Wiki/NumPy_for_Matlab_Addicts
> >
> > Thanks,
> > Bill Baxter
> >
>
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