[Matplotlib-users] scatter plot with data coord sized glyphs
heiland at iu.edu
Wed May 22 07:15:55 EDT 2019
Scott, thanks for the help once again! Yes, the results are exactly what I want, and seem to be quite fast for lots of circles.
> On May 21, 2019, at 2:39 PM, Scott Lasley <selasley at icloud.com> wrote:
> From the docstring in circles - "Note that `c` should not be a single numeric RGB or RGBA sequence because that is indistinguishable from an array of values to be colormapped. (If you insist, use `color` instead). So a slight modification of your code seems to do what you want
> fig = plt.figure(figsize=(5,3))
> ax = fig.gca()
> xvals = np.array([0,100])
> yvals = np.array([0,0])
> rvals = np.array([30,10])
> rgb = np.array([[255, 0, 0], [0, 255, 0]])
> circles(xvals, yvals, s=rvals, color=rgb / 255.) # use color instead of c and make 0. <= rgb <= 1.
>> On May 21, 2019, at 2:08 PM, Heiland, Randy <heiland at iu.edu> wrote:
>> Thanks Scott! That certainly gets me closer. One question/problem I still have is that it doesn’t seem to like RGB as colors, in spite of the docs. I’ve attached a simple example.
>>> On May 21, 2019, at 12:35 PM, Scott Lasley <selasley at icloud.com> wrote:
>>> Syrtis Major's gist at https://gist.github.com/syrte/592a062c562cd2a98a83 seems to do what you want. See this stackoverflow answer for an example of the circles function in action -
>>>> On May 21, 2019, at 11:42 AM, Heiland, Randy <heiland at iu.edu> wrote:
>>>> Is it possible to specify scatter plot glyph sizes - specifically, circles and, e.g., radii, in data coords, rather than “marker size” of “points**2”?
>>>> thanks, Randy
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