Hello all,
I just noticed that the 'fill' option of implicit_plot is broken. The
following example, from the reference manual [1], returns a plot which is
entirely blue, rather than just filling the circle as the documentation claims.
sage: x,y = var('x,y')sage: f(x,y) = x^2 + y^2 - 2sage: implicit_plot(f, (-3,
3), (-3, 3),fill=True)
If no one else has noticed this yet, I'll open a ticket. Does anyone know what
change to Sage would have caused this? Incidentally, I guess this is a good
example of what can go wrong by not somehow doctesting the output of graphics
commands.
Moreover, the syntax used here is deprecated and probably should have been
updated when the deprecation warning was added to Sage. Is there a ticket for
this already?
[1]:
http://www.sagemath.org/doc/reference/sage/plot/contour_plot.html#sage.plot.contour_plot.implicit_plot
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