Justin, that is right. "return" caused a graph to be drawn.
Now that you pointed out why it didn't work, I see another solution:
graph = complex_plot(g, (-3, 3), (-3, 3))
graph.show()
which doesn't require a return statement; since my original intention was
to put
the drawing command inside a loop and draw a lot of graphs, I'll need to
do it with "show"
rather than "return". Thank you.
Michael
On Tuesday, November 13, 2018 at 8:38:52 PM UTC-8, Michael Beeson wrote:
>
> def nov13():
> var('M,N,z')
> f = (M^2-3*N)*(-i *sqrt(3)-1) *z^3
> f = f + (M^2 *(-i *sqrt(3) +3) + 3*N*(-i *sqrt (3) - 1))*z^2
> f = f + (M^2 *(i *sqrt(3)+3) + 3*N* (i* sqrt(3)-1))*z + (M^2-3*N)* (i*
> sqrt(3)-1)
> g = f.substitute(M=6,N=11)
> complex_plot(g, (-3, 3), (-3, 3))
>
> if this code is put in a file and the file is "attached" I get no plot,
> but if
> I paste the function body in to a prompt then I do get a (very nice) plot.
>
> I expected it would run from an attached file, which is how I usually use
> SageMath.
> Can someone explain why I don't get a plot that way?
>
>
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