On Tue, Aug 19, 2008 at 8:23 PM, Mike Witt <[EMAIL PROTECTED]> wrote:
>
> Hi, I'm a long time Mathematica user who just discovered Sage a couple
> of months ago, and I'm starting to warm up to it. I have a question
> about parametric_plot.
>
> It appears that if you've got a function that evaluates to zero, then
> parametric_plot won't accept it. For example, if z(a,b)=e^(I*b + a)
> then this seems to be OK:
>
> show(animate([parametric_plot((real(z(x,b)), imag(z(x,b))), 0, 1) for
> b in srange(pi/6, 2*pi/6, pi/24)]))
>
> But if I do this:
>
> show(animate([parametric_plot((real(z(x,b)), imag(z(x,b))), 0, 1) for
> b in srange(-pi/6, 2*pi/6, pi/24)]))
>
> I have a problem, which (I *think*) is because the imaginary part of
> z(x,b) evaluates to zero during the animation.
I don't understand the question. Are you saying for the commands
sage: z = var("z")
sage: z = lambda a,b: e^(I*b + a)
sage: show(animate([parametric_plot((real(z(x,b)), imag(z(x,b))), 0,
1) for b in srange(pi/6, 2*pi/6, pi/24)]))
you have a problem? What is it exactly?
>
> And so, perhaps, this is related to Ticket #2410. On the other hand,
> it could just be some misunderstanding on my part. In any event, if
> anyone can shed any light on this I'd appreciate it.
>
> As long as I'm here, a 2nd question. Using the command line interface,
> is there any way I can spawn more than one window to render different
> plots in them at the same time? (Of, if Ticket #2380 is likely to be
> worked on in the near future, that would be even better.) Or, if
> there is some other way to get multiple plots (from the command line)
Sorry but I don't understand this question either. Do you want something like
this:?
sage: P = plot(sin(x),x,0,1)
sage: Q = plot(cos(x),x,0,1)
sage: show(P+Q)
>
> Thanks!
>
> -Mike
>
> >
>
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