Error converting to_rgba while using color syntax versus c syntax

[dhhagan]

If a third variable is used to color a scatter plot, a ValueError is thrown using the keyword color whereas no error is thrown if c is used instead.

Error:

plt.scatter(xdata, ydata, color = colordata, cmap = colormap)

ValueError: to_rgba: Invalid rgba arg XX
to_rgb: Invalid rgb arg XX
cannot convert argument to rgb sequence

No Error:

plt.scatter(xdata, ydata, c = colordata, cmap = colormap)

[efiring]

I think this is a misunderstanding, not a bug. There is no intention that keyword "color" be able to specify a set of values to be colormapped. Is there something in the docs indicating otherwise?

[mwaskom]

c and color are pretty much interchangable almost anywhere else in matplotlib...

[efiring]

@mwascom, I don't see this. At least in a fairly quick scan, I see scads of variations on color (colors, facecolor, etc.) but plot() looks like the only place where there is a c alias for it. I could be missing others. In any case, the scatter documentation is clear and explicit on this point; and the c argument is not a full 'color-style' argument. It is more like 'zdata', since it is used only for color-mapping. It does not work with actual color specifications.

[WeatherGod]

We do "facecolor" == "fc", "edgecolor" == "ec".

On Mon, Jun 8, 2015 at 3:18 AM, Eric Firing notifications@github.com
wrote:

@mwascom, I don't see this. At least in a fairly quick scan, I see scads
of variations on color (colors, facecolor, etc.) but plot() looks like
the only place where there is a c alias for it. I could be missing
others. In any case, the scatter documentation is clear and explicit on
this point; and the c argument is not a full 'color-style' argument. It
is more like 'zdata', since it is used only for color-mapping. It does not
work with actual color specifications.

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