Henryk Trappmann wrote: > On Mar 23, 8:57 pm, Robert Bradshaw <rober...@math.washington.edu> > wrote: >> Do you mean something likehttp://trac.sagemath.org/sage_trac/ticket/ >> 3813 , and if so, why isn't this used by default? > > Ya thats for plot, I think we need a slightly different approach for > parametric_plot. > The common demand is that the curve shall look smooth where it is > smooth. > Verification example can be > parametric_plot((lambda x: arctan(x),lambda x: arctan(x)**2), > (-1000,1000)) > > Implementation: insert points so long until the angles at each point > only slightly deviate from 180deg, or (in the case of a kink) until > the points are close enough. 0.1rad is a well looking maximum > deviation from 180deg.
In order to avoid bogging down the computation, you can subdivide until you've hit some pre-determined maximum recursion level. I believe that is how the plot() command works, giving an option to set that maximum recursion level. I think this would be very nice for parametric_plot if it's not there already. Jason --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to sage-devel-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
