Looks like a bug -- it should accept either 3 or 4 columns. I'll have a 
chance to look at this further this afternoon.

Cheers,
Mike

Ben Axelrod wrote:
>
> I get an error when I use the scatter plot and set the ā€˜c’ value to a 
> list of 3-tuples. The error goes away if I use 4-tuples instead. Are 
> colors with only 3 values not supported anymore?
>
> …
>
> File "C:\Python24\Lib\site-packages\matplotlib\axes.py", line 4807, in 
> scatter
>
> colors = mcolors.colorConverter.to_rgba_array(c, alpha)
>
> File "C:\Python24\Lib\site-packages\matplotlib\colors.py", line 343, 
> in to_rgba_array
>
> c[i] = self.to_rgba(cc, alpha) # change in place
>
> ValueError: shape mismatch: objects cannot be broadcast to a single shape
>
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-- 
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA


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