On Sat, Jan 2, 2010 at 10:39 AM, Sterling <sterlin...@gmail.com> wrote:
> In the notebook under sage 4.2.1 this code seems to work OK, but under
> sage 4.3 I get an error. Is there some syntax change I overlooked?
>
> b = plot(sqrt(3)*x,(0,4))
> f(z) = 4*log(z^3)-2*log(z^3-8)
> g = lambda x,y: imag(f(x+y*I)) if y < sqrt(3)*x else float('nan')
> a = contour_plot(g,(x,0,4),(y,0,4),fill=False,contours=30)
> c = a + b
> c
>
> Thanks. This isn't imperative by any means. I was just going through
> some old notebooks from last semester.
Thanks. This has nothing to do with the Sage notebook. It comes from
some change in symbolic manipulation:
sage: b = plot(sqrt(3)*x,(0,4))
sage: f(z) = 4*log(z^3)-2*log(z^3-8)
sage: g = lambda x,y: imag(f(x+y*I)) if y < sqrt(3)*x else float('nan')
sage: var('x,y')
sage: time a = contour_plot(g,(x,0,4),(y,0,4),fill=False,contours=30)
boom...
William
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