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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