On Tue, Oct 21, 2008 at 6:30 AM, kcrisman <[EMAIL PROTECTED]> wrote:
>
> The new variables don't seem to work well with the plotting code as
> is; I give below output for two plots using old and new variables. I
> assume this is known, but just wanted to put it out there.
That's because we have a big todo list for transitioning completely over
to Pynac, and we haven't got to the plotting part yet. I.e., it's really
just not implemented (yet).
William
>
> On the plus side, the new variables are MUCH faster. How do I know?
> Because for the first time ever using Sage, I don't have to wait for a
> variable! It is also nice to not see that "Exiting spawned Maxima
> process." message. So thank you to Burcin and the rest involved in
> this.
>
> - kcrisman
>
> Examples:
>
> Using old variables in 3.2.alpha0 works fine:
> sage: var('x,y,z')
> (x, y, z)
> sage: plot(x^2,0,1) [works]
> sage: plot(x^2,x,0,1) [works]
>
> Using new variables in same version, not so good:
> sage: var('x,y,z', ns=1)
> (x, y, z)
> sage: (x+y).variables()
> [x, y] # proves we have the new variables
> sage: plot(x^2,0,1)
> verbose 0 (3605: plot.py, _plot) WARNING: When plotting, failed to
> evaluate function at 400 points.
> verbose 0 (3605: plot.py, _plot) Last error message:
> ''sage.symbolic.expression.Expression' object is not callable'
> sage: plot(x^2,x,0,1)
> verbose 0 (3400: plot.py, plot) there were 3 extra arguments (besides
> x^2)
> ---------------------------------------------------------------------------
> UnboundLocalError Traceback (most recent call
> last)
>
> <snip>
>
> /Users/.../site-packages/sage/plot/plot.pyc in plot(funcs, *args,
> **kwds)
> 3601 if do_show:
> 3602 G.show()
> -> 3603 return G
> 3604
> 3605 def _plot(funcs, xrange, parametric=False,
>
> UnboundLocalError: local variable 'G' referenced before assignment
>
>
> >
>
--
William Stein
Associate Professor of Mathematics
University of Washington
http://wstein.org
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