On Thu, Mar 14, 2024 at 10:35 AM Dima Pasechnik <dimp...@gmail.com> wrote:
> It might help seeing your graphs here, too. > It is attached, Dima. Note that the correct graph should be (for all practical purposes) simply the plot of the constant function 1 for all x. [image: bug-in-plot-of-rational-function.jpg] > On Thu, Mar 14, 2024 at 10:04 AM David Joyner <wdjoy...@gmail.com> wrote: > >> Hi: >> >> I'm trying to show my students a plot of >> a rational function whose graph is basically 1, >> so I plotted >> f(x) = (x^2+0.0001)/(x^2+0.0001000001) >> However, there is a problem: Note the difference between >> plot((x^2+0.0001)/(x^2+0.0001000001), (x,-10,10)) >> (which dips down near x=0) and >> plot((x^2+0.0001)/(x^2+0.0001000001), (x,-10,10), ymin = -0.1, ymax = 1.5 >> ) >> (which basically looks like a straight line). >> Same problem for lists: >> >> sage: L = [(x/100, f(x/100)) for x in range(-100, 100)] >> sage: list_plot(L) # bug? >> sage: list_plot(L, ymin=-0.5, ymax=1.5) # good >> >> This is using 'SageMath version 10.3.rc1, Release Date: 2024-02-29' on >> an ubuntu machine. Can anyone tell what is going on here? I'm happy to >> attached jpgs of the plots I get, if desired. >> >> For comparison, it appears that Sympy plots this correctly. >> >> - David Joyner >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "sage-support" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to sage-support+unsubscr...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/sage-support/CAEQuuAXPcQ6_g67a7L4bdy1Ko%2BFH1VnHAT25G3LfY6XR1mMaEg%40mail.gmail.com >> <https://groups.google.com/d/msgid/sage-support/CAEQuuAXPcQ6_g67a7L4bdy1Ko%2BFH1VnHAT25G3LfY6XR1mMaEg%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> > -- > You received this message because you are subscribed to the Google Groups > "sage-support" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sage-support+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sage-support/CAAWYfq1DheVMU-33w7uvSFn1HrtWqrNWT4ciH6W3AtvF-J4_jw%40mail.gmail.com > <https://groups.google.com/d/msgid/sage-support/CAAWYfq1DheVMU-33w7uvSFn1HrtWqrNWT4ciH6W3AtvF-J4_jw%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/CAEQuuAXj-9NV-AWw0BJY7kFVRYQhP-LbAW3ikh%3D88_y6zFQnLA%40mail.gmail.com.
