I would like to plot lots of error ellipses on my plot. I thought I could use an EllipseCollection to do so, but I didn't manage to get the ellipse sizes, expressed in data units, right (see test script attached).
When using a plain list of Ellipse's, everything looks fine:
ells = [ P.matplotlib.patches.Ellipse(xy=xyi,
for xyi,wi,hi,ai in zip(xy,w,h,a)]
for ell in ells:
But when using EllipseCollection (as explained in http://matplotlib.sourceforge.net/examples/pylab_examples/ellipse_collection.html),
coll = P.matplotlib.collections.EllipseCollection(widths=w,
the size of the ellipses (expressed in data units) appears incorrect, and depends furthermore of the aspect ratio of the figure (try pan/zoom or resize the interactive window).
I naively thought the two approaches should give the same result... Did I miss something in the way to use EllipseCollections?
ellipseColl.py (1.47 KB)
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