A way to compute a 2d histogram

David Huard david.huard at gmail.com
Tue Oct 24 15:40:22 CDT 2006


Xavier,
Here is the patch against svn. Please report any bug. I haven't had the time
to test it extensively, something that should be done before commiting the
patch to the repo. I'd appreciate your feedback.

David

2006/10/24, David Huard <david.huard at gmail.com>:
>
> Hi Xavier,
>
> You could tweak histogram2d to do what you want, or you could give me a
> couple of days and I'll do it and let you know. If you want to help, you
> could write a test using your particular application and data.
>
> David
>
>
>
>
>
>
>
>
>
>
>
> 2006/10/24, Xavier Gnata <gnata at obs.univ-lyon1.fr>:
> >
> > Hi,
> >
> > I have a set of 3 1D large arrays.
> > The first 2 one stand for the coordinates of particules and the last one
> > for their masses.
> > I would like to be able to plot this data ie to compute a 2D histogram
> > summing the masses in each bin.
> > I cannot find a way to do that without any loop on the indices resulting
> > too a very slow function.
> >
> > I'm looking for an elegant way to do that with numpy (or scipy??)
> > function.
> >
> > For instance, scipy.histogram2d cannot do the job because it only counts
> > the number of samples in each bin.
> > There is no way to deal with weights.
> >
> > Xavier.
> >
> >
> > --
> > ############################################
> > Xavier Gnata
> > CRAL - Observatoire de Lyon
> > 9, avenue Charles André
> > 69561 Saint Genis Laval cedex
> > Phone: +33 4 78 86 85 28
> > Fax: +33 4 78 86 83 86
> > E-mail: gnata at obs.univ-lyon1.fr
> > ############################################
> >
> >
> >
> > -------------------------------------------------------------------------
> > Using Tomcat but need to do more? Need to support web services,
> > security?
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> > Download IBM WebSphere Application Server v.1.0.1 based on Apache
> > Geronimo
> > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> >
> > _______________________________________________
> > Numpy-discussion mailing list
> > Numpy-discussion at lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/numpy-discussion
> >
>
>
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