On Mon, May 28, 2012 at 7:58 PM, Travis Oliphant <tra...@continuum.io>wrote:
> I didn't see anyone respond to this, but looking over his simple and > elegant solution it seems like a useful addition to the 2-d functions > available in NumPy as it works with any 2-d array (image or matrix) and > does a transformation on the indices in order to organize the sum. > > It is not a general-purpose interpolating approach where the 2-d array is > viewed as samples of an underlying continuous function. > > Are their other thoughts? > > This was discussed (not finished yet) on scipy-dev: http://thread.gmane.org/gmane.comp.python.scientific.devel/16538/focus=16541. Ralf > -Travis > > > > On Mar 7, 2012, at 12:39 PM, Robert Jördens wrote: > > > Hi everyone, > > I am proposing to add the the two following functions to > > numpy/lib/twodim_base.py: > > > > sum_angle() computes the sum of a 2-d array along an angled axis > > sum_polar() computes the sum of a 2-d array along radial lines or > > along azimuthal circles > > > > https://github.com/numpy/numpy/pull/230 > > > > Comments? > > > > When I was looking for a solution to these problems of calculating > > special sums of 2-d arrays I could not find anything and it took me a > > while to figure out a (hopefully) useful and consistent algorithm. > > I can see how one would extend these to higher dimensions but that > > would preclude using bincount() to do the heavy lifting. > > Looking at some other functions, the doctests might need to be split > > into real examples and unittests. > > > > Best, > > > > -- > > Robert Jordens. > > _______________________________________________ > > NumPy-Discussion mailing list > > NumPy-Discussion@scipy.org > > http://mail.scipy.org/mailman/listinfo/numpy-discussion > > _______________________________________________ > NumPy-Discussion mailing list > NumPy-Discussion@scipy.org > http://mail.scipy.org/mailman/listinfo/numpy-discussion >
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