Re: [Matplotlib-users] Jagged Edges in Scatter Charts Circles

You can pass in a "marker" argument with a tuple of the form (numsides, 
style, angle) to scatter.

              *numsides*:
                the number of sides

              *style*:
                the style of the regular symbol:

                =====   ==================
                Value   Description
                =====   ==================
                0       a regular polygon
                1       a star-like symbol
                2       an asterisk
                =====   ==================

              *angle*:
                the angle of rotation of the symbol

For example:

   scatter(marker=(100, 0, 0))

You can make "numsides" as high as you need until it's smooth enough at 
the sizes you need.

On a related note, now that matplotlib can use splines to draw circles 
(in the 0.98.x series), matplotlib should probably do that for scatter 
circles.  This will require changing some code on our end.  This will 
avoid requiring the kind of workaround I suggest above.

Cheers,
Mike

Kelvin Quee wrote:
> Hi folks,
>
> I'm currently trying to plot some Bubble Charts using the scatter plot
> function.
>
> It works beautifully, but the circles drawn are a little too jagged for
> my liking.
>
> I'm following the example shown here -
>
> http://matplotlib.sourceforge.net/screenshots.html
> (look for scatter plot)
>
> Even in the example picture, you can see slight jagged edges in bigger
> circles.
>
> http://matplotlib.sourceforge.net/screenshots/scatter_demo2_large.png
>
> Does anyone have a clue on how I can improve the way the bubbles are
> rendered?
>
>   

-- 
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA