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I'd like to call attention to the fact that parametric_plot3d cannot
plot curves (or surfaces) that include complex values. This is despite
that it's documentation states that: By default for a curve any points where for example: var('u v') parametric_plot3d((u,0,sqrt(1-u^2)),(u,-1,1)) will work, but parametric_plot3d((u,0,sqrt(1-u^2)),(u,-1,2)) will not (I would expect them to produce identical curves). Also, surfaces could benefit from ignoring complex values, for example: parametric_plot3d((u,0,sqrt(1-u^2-v^2)),(u,-1,1),(v,-1,1)).show(aspect_ratio=(1,1,1)) should draw half a sphere. thanks Oscar -- To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org |
