Hi,
I need to superimpose several region_plot's. These have regions
colored in different colors which may or may not overlap. However, if
I do something like
var('p q')
plot1 = region_plot([p+q<1, p+q>-1], (p,-2,2), (q,-2,2), incol='red')
plot2 = region_plot([p-q<1, p-q>-1], (p,-2,2), (q,-2,2), incol='blue')
show(plot1+plot2)
then I see at most the outline of the first plot. It seems that the
second plot covers up the first plot, since the default value of
outcol is 'white'.
Is there any way to make these plots transparent (i.e. with an alpha
value less than 1), or at least not opaque? I tried putting the
option
outcol=None
but this is not accepted. This would seem to me to be the first way of
solving the issue.
I had a look at the code for region_plot, which I at least understand
the idea of. It uses matplotlib for the graphics, so perhaps the
question of transparency is a matplotlib question. Nonetheless, I
believe that matplotlib does have this capability, so this should be
possible...!
Thanks and best wishes,
David.
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