Hello, Setting countours to None makes implicit_plot for x==y do something like http://picpaste.com/SqB3JiID.png - definitely wrong.
When setting countours to something like in region_plot: contours=[-1e307, 0, 1e307] - it gave expected result. Also setting it to something like [-eps, +eps], where eps was small enough (like smaller than line width) was ok. I think this is serious bug, at least for audience of my book (on Sage, aimed at highschoolers). This is function we used quite a bit in few chapters. Is this somewhere in Trac already? Regards, Andrzej. On Sat, Jan 16, 2016 at 10:05 PM, Francois Bissey <[email protected]> wrote: > >> On 17/01/2016, at 09:57, kcrisman <[email protected]> wrote: >> >> >> >> Does anyone knows why the default option for “contours” is >> set to “(0,0)” in implicit_plot (sage/plot/contour_plot.py line 571-572)? >> Instead of being left alone to “None”. >> >> >> I imagine that is what someone set it to long ago either in copying from >> something else or because it made things "look right" in some situation. If >> you try a wide variety of implicit plots with None and everything seems to >> be exactly the same, then this seems like a reasonable change. I don't know >> the history here, though (or I have forgotten it). >> > > Yes a long time ago. I have no idea if it will look the same but > matplotlib now says it is wrong to use it that way so it will have > to change one way or another. > Setting things to “None" make the dockets pass but I have no idea > of what it looks like. Won’t be able to really look at pictures until > Thursday. > > François > > > -- > You received this message because you are subscribed to the Google Groups > "sage-devel" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/sage-devel. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
