let me alter the first line to x,y,z,t = var('x,y,z,t')
On Sep 14, 5:49 pm, MathLynx <[email protected]> wrote:
> What is wrong with
>
> x,y,z = var('x,y,z')
> P = implicit_plot3d(x^2 +y^2 -z^2 ==1, (x,-3.2,3.2),(y,-3.2,3.2),
> (z,-3,3),opacity=.2,color='blue')
> for k in range(20)
> P += parametric_plot3d([cos((2*pi*k)/(20))+sin((2*pi*k)/
> (20))*t,sin((2*pi*k)/(20))-cos((2*pi*k)/(20))*t,t],
> (t,-3,3),color='red',thickness=2)
> P.show()
>
> ???
>
> This is supposed to produce a hyperboloid of one sheet with 20 of the
> lines ruling this surface. I can add the lines in one at a time by
> hand but that's silly. So the issue seems to be how am I misusing a
> for loop in python? I have looked at several tutorials on python and
> cannot identify my error. Any suggestions?
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