[Numpy-discussion] Quaternion data type

Val Kalatsky kalatsky at gmail.com
Sat May 5 15:14:47 EDT 2012


Hi Tod,

Would you consider bundling the quaternion dtype with your package.
I think everybody wins: your package would become stronger and
Martin's dtype would become easily available.
Thanks
Val

On Sat, May 5, 2012 at 6:27 AM, Tom Aldcroft
<aldcroft at head.cfa.harvard.edu>wrote:

> On Fri, May 4, 2012 at 11:44 PM, Ilan Schnell <ischnell at enthought.com>
> wrote:
> > Hi Chuck,
> >
> > thanks for the prompt reply.  I as curious because because
> > someone was interested in adding http://pypi.python.org/pypi/Quaternion
> > to EPD, but Martin and Mark's implementation of quaternions
> > looks much better.
>
> Hi -
>
> I'm a co-author of the above mentioned Quaternion package.  I agree
> the numpy_quaternion version would be better, but if there is no
> expectation that it will move forward I can offer to improve our
> Quaternion.  A few months ago I played around with making it accept
> arbitrary array inputs (with similar shape of course) to essentially
> vectorize the transformations.  We never got around to putting this in
> a release because of a perceived lack of interest / priorities... If
> this would be useful then let me know.
>
> Best,
> Tom
>
> > - Ilan
> >
> >
> > On Fri, May 4, 2012 at 5:36 PM, Charles R Harris
> > <charlesr.harris at gmail.com> wrote:
> >> Hi Ilan
> >>
> >> On Fri, May 4, 2012 at 3:38 PM, Ilan Schnell <ischnell at enthought.com>
> wrote:
> >>>
> >>> Hello everyone,
> >>>
> >>> what is the plan for Quaternion data types in numpy?
> >>> I saw that during last years SciPy spring
> >>> https://github.com/martinling/numpy_quaternion
> >>> was started, but not updated or released since then.
> >>>
> >>
> >> That was Martin Ling, link and thread here . I'm not sure what happened
> with
> >> this but I suspect we are waiting for extension types to be fixed up in
> >> master. Mark had some thoughts along those lines.
> >>
> >> Chuck
> >>
> >>
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