Oliver Block wrote: > Dear Stefanie, > > On Mon, Feb 23, 2009 at 11:55:27AM +0100, Stefanie Schmidt wrote: > [...] >> G=plot(h(f), 0, 20) >> G.show() > Although I am not a sage expert, I would say, you want the > following: > > G=plot(h, 0, 20) > G.show() > > Do not give an argument to h.
Yes, that is correct. When someone calls plot(h(f), 0, 20), then h is evaluated at f first, so if f was 10, then plot(h(f), 0, 20) is exactly the same as plot(0, 0, 20). In order to call h with the numeric values between 0 and 20, you need to pass the *function* h, not the output of evaluating the function at f. Things would work differently if h was a symbolic expression, rather than a python function. For example: h(x) = sin(x) plot(h(x), (x, 0, 20)) or plot(h, 0, 20) would both give the expected plot, because h(x) is sin(x) (i.e., a function, not a number), and h is the function x |--> sin(x). Jason --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
