Re: [Matplotlib-users] Alpha and colorbar using contourf

[Tom D. <tom...@al...>]

Thanks Eric.

On 11/9/06, Eric Firing <ef...@ha...> wrote:
>
> Tom,
>
> This is a bug.  It looks like I completely forgot about handling alpha
> when I rewrote the colorbar code.  I will try to get it fixed in the
> next few days.  Thanks for the report.
>
> Eric
>
> Tom Denniston wrote:
> > When I use contourf with an alpha argument and the "hot" color scheme.
> > The alpha causes the colors to come out lighter but the colorbar does
> > not adjust accordingly.  Is this a bug or do I simply need to adjust the
> > colorbar in some manner?
> >
> >
> >
> > Below is an adaptation of pcolor.py from the screenshots page and
> > attached is the output I see.
> >
> > I am using matplotlib 0.87.7:
> >
> > In [3]: matplotlib.__version__
> > Out[3]: '0.87.7'
> >
> >  --------------------------------------------------
> >
> >
> >
> >
> > from __future__ import division
> > from pylab import *
> >
> > def func3(x,y):
> >     return (1- x/2 + x**5 + y**3)*exp(-x**2-y**2)
> >
> > dx, dy = 0.025, 0.025
> > x = arange(-3.0, 3.0, dx)
> > y = arange(-3.0, 3.0, dy)
> > X,Y = meshgrid(x, y)
> >
> > Z = func3(X, Y)
> >
> >
> > cset = contourf(Z, arange(-1.2,1.6,0.5),
> >                origin='lower',
> >                extent=(-3,3,-3,3), alpha=.5
> >                )
> >
> >
> > axis('off')
> > hot()
> > colorbar()
> > title('Some like it hot')
> > show('example')
> >
> >
> > ------------------------------------------------------------------------
> >
> >
> > ------------------------------------------------------------------------
> >
> >
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