matplotlib 0.98.0 colors problem LineCollection

Development matplotlib-devel
1

Hi,

setting colors with transparency no longer works for me in
0.98.0, but worked before in 0.91.3:

c = matplotlib.collections.LineCollection(lines, colors = lineColors)

This shows the lines only with the base colors without transparency.

However, if I modify the code to the following, the colors shows
properly with transparency:

c = matplotlib.collections.LineCollection(lines)
c.set_color(lineColors)

Mátyás János

2

Thanks. mpl was applying the default alpha of 1.0 to the set of colors rather than ignoring it when an alpha is provided for each color. This is now fixed in SVN r5554

Cheers,
Mike

M�ty�s J�nos wrote:

···

Hi,

setting colors with transparency no longer works for me in
0.98.0, but worked before in 0.91.3:

c = matplotlib.collections.LineCollection(lines, colors = lineColors)

This shows the lines only with the base colors without transparency.

However, if I modify the code to the following, the colors shows
properly with transparency:

c = matplotlib.collections.LineCollection(lines)
c.set_color(lineColors)

M�ty�s J�nos

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

3

Hi,

thank you for the fix. It works great now.

Mátyás János

···

On Mon, 16 Jun 2008 08:15:39 -0400 Michael Droettboom <mdroe@...31...> wrote:

Thanks. mpl was applying the default alpha of 1.0 to the set of
colors rather than ignoring it when an alpha is provided for each
color. This is now fixed in SVN r5554

Cheers,
Mike

Mátyás János wrote:
> Hi,
>
> setting colors with transparency no longer works for me in
> 0.98.0, but worked before in 0.91.3:
>
> c = matplotlib.collections.LineCollection(lines, colors =
> lineColors)
>
> This shows the lines only with the base colors without transparency.
>
> However, if I modify the code to the following, the colors shows
> properly with transparency:
>
> c = matplotlib.collections.LineCollection(lines)
> c.set_color(lineColors)
>
>
> Mátyás János