[Matplotlib-users] Version 0.98 behavior change - scatter
There seems to have been a change to the behavior of the 'alpha' keyword option
to scatter(): where previously alpha only affected the facecolor, and the
edgecolor always had an alpha of 1.0, alpha now seems to affect both facecolor
and edgecolor. Tested with 0.93.1 and 0.98. Tested with new API for 0.98 as
well.
ax.scatter(xSeries, ySeries, s=sY, c='k', alpha=0, edgecolor='k')
and
plot1=ax.scatter(xSeries, ySeries, s=sY, c='k')
plot1.set_alpha(0)
plot1.set_edgecolor('k')
Is there any way to get the old behavior using version 0.98 and forward?
Thanks,
Murthy
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Re: [Matplotlib-users] Version 0.98 behavior change - scatter
As a quick-fix workaround, you can do:
from matplotlib.pyplot import *
p = scatter([0,1,2,3], [4,5,6,7], c ='k', alpha=0, edgecolor = 'k')
p._alpha = 1.0
p.set_edgecolor('k')
show()
But the deeper question is for the rest of the list is... what's the
correct behavior? Should we just revert to what it did in 0.91, or add
another kwarg to set the edge alpha?
Cheers,
Mike
S Murthy Kambhampaty wrote:
There seems to have been a change to the behavior of the 'alpha' keyword
option to scatter(): where previously alpha only affected the facecolor, and
the edgecolor always had an alpha of 1.0, alpha now seems to affect both
facecolor and edgecolor. Tested with 0.93.1 and 0.98. Tested with new API
for 0.98 as well.
ax.scatter(xSeries, ySeries, s=sY, c='k', alpha=0, edgecolor='k')
and
plot1=ax.scatter(xSeries, ySeries, s=sY, c='k')
plot1.set_alpha(0)
plot1.set_edgecolor('k')
Is there any way to get the old behavior using version 0.98 and forward?
Thanks,
Murthy
-
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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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Re: [Matplotlib-users] Version 0.98 behavior change - scatter
Michael Droettboom wrote:
As a quick-fix workaround, you can do:
from matplotlib.pyplot import *
p = scatter([0,1,2,3], [4,5,6,7], c ='k', alpha=0, edgecolor = 'k')
p._alpha = 1.0
p.set_edgecolor('k')
show()
But the deeper question is for the rest of the list is... what's the
correct behavior? Should we just revert to what it did in 0.91, or add
another kwarg to set the edge alpha?
I think 0.91 behavior was odd, if alpha applied only to the fill; making
alpha apply to everything strikes me as a bugfix, not a regression, so I
would not favor reverting to the old behavior.
What is really needed may be some rethinking (or perhaps just
codification) of overall alpha handling throughout mpl, including kwargs
and explicit color specification. At present it seems rather messy, for
understandable historical reasons, partly owing to backend quirks and
limitations (e.g., no alpha at all in postscript).
If the kwarg strategy is chosen, then everywhere there can be an edge
and a face, we should support alpha= to apply to both, edgealpha=
for the edge alone, and facealpha= for the face. Or something like that.
Eric
Cheers,
Mike
S Murthy Kambhampaty wrote:
There seems to have been a change to the behavior of the 'alpha' keyword
option to scatter(): where previously alpha only affected the facecolor, and
the edgecolor always had an alpha of 1.0, alpha now seems to affect both
facecolor and edgecolor. Tested with 0.93.1 and 0.98. Tested with new API
for 0.98 as well.
ax.scatter(xSeries, ySeries, s=sY, c='k', alpha=0, edgecolor='k')
and
plot1=ax.scatter(xSeries, ySeries, s=sY, c='k')
plot1.set_alpha(0)
plot1.set_edgecolor('k')
Is there any way to get the old behavior using version 0.98 and forward?
Thanks,
Murthy
-
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Re: [Matplotlib-users] Version 0.98 behavior change - scatter
Eric Firing wrote:
Michael Droettboom wrote:
As a quick-fix workaround, you can do:
from matplotlib.pyplot import *
p = scatter([0,1,2,3], [4,5,6,7], c ='k', alpha=0, edgecolor = 'k')
p._alpha = 1.0
p.set_edgecolor('k')
show()
But the deeper question is for the rest of the list is... what's the
correct behavior? Should we just revert to what it did in 0.91, or add
another kwarg to set the edge alpha?
I think 0.91 behavior was odd, if alpha applied only to the fill; making
alpha apply to everything strikes me as a bugfix, not a regression, so I
would not favor reverting to the old behavior.
What is really needed may be some rethinking (or perhaps just
codification) of overall alpha handling throughout mpl, including kwargs
and explicit color specification. At present it seems rather messy, for
understandable historical reasons, partly owing to backend quirks and
limitations (e.g., no alpha at all in postscript).
If the kwarg strategy is chosen, then everywhere there can be an edge
and a face, we should support alpha= to apply to both, edgealpha=
for the edge alone, and facealpha= for the face. Or something like that.
+1
Eric
Cheers,
Mike
S Murthy Kambhampaty wrote:
There seems to have been a change to the behavior of the 'alpha' keyword
option to scatter(): where previously alpha only affected the facecolor,
and the edgecolor always had an alpha of 1.0, alpha now seems to affect
both facecolor and edgecolor. Tested with 0.93.1 and 0.98. Tested with
new API for 0.98 as well.
ax.scatter(xSeries, ySeries, s=sY, c='k', alpha=0, edgecolor='k')
and
plot1=ax.scatter(xSeries, ySeries, s=sY, c='k')
plot1.set_alpha(0)
plot1.set_edgecolor('k')
Is there any way to get the old behavior using version 0.98 and forward?
Thanks,
Murthy
-
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