Transparency option in streamline plot
In most graphics functions it's possible to set the transparency of the plot with the alpha option. In a streamline plot, e.g. take
sage: var('x, y')
sage: streamline_plot((y, -x**2 * y - x + y), (x, -3, 3), (y, -3, 3), density=1.4, color='black')
it doesn't work:
sage: var('x, y')
sage: streamline_plot((y, -x**2 * y - x + y), (x, -3, 3), (y, -3, 3), density=1.4, color='black', alpha=0.5)
...
WARNING: Ignoring option 'alpha'=0.500000000000000
...
Is there a workaround for this?
Cool, thanks!! that solves the problem. (I fiddled around with
def streamline_plot(f_g, xrange, yrange, **options)but i didn't get it work.)