I know about plot?. But you misread my post. I was not trying to type Maple commands into Sage.
I was wondering why there should be such a blatant difference between plotting x->x^2 and plotting the zeta function on an interval on the real axis. My point was that Maple shows this is not necessary. The answer for Sage is that zeta is a numeric function and x^2 is a symbolic expression. But why do I have to know that if I only want to make a simple plot? And besides I think the manual of plot does not say anything about the distinction. Furthermore zeta is somehow regarded as a complex function and not so x^2 (which of course can also be extended to the complex plane). Again why is there a distinction? I think inconsistency is an enemy of user friendlyness. Regards, Michel On Nov 1, 1:24 pm, mabshoff <[EMAIL PROTECTED]> wrote: > On Nov 1, 4:59 am, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote: > > Hi, > > > > > I want to make a simple plot for a talk. As an experiment I try > > > plot(x^2,2,10) (*) > > > and it works as expected. So happily I go for the real thing > > > plot(zeta(x),2,10) (**) > > > Unfortunately I get a long list of exceptions but no clear indication > > what the problem is. > > > plot(zeta,2,10) (*) > > > yields an empty plot. > > > plot(real(zeta(x)),2,10) > > > gives again exceptions..... > > > After several tries I finally find something that works > > > plot(lambda x:real(zeta(x)),2,10) (**) > > > In retrospect I can explain why this magic incantation makes sense. > > But I think many users will be baffled by the difference in > > complexity between (*) and (**). In Maple there is no difference > > between (*) and (**). > > > This is sage 3.0.5. Released 2008-07-11. > > Type plot? into a Sage session and you will see plenty of > documentation with examples. How is one supposed to know about syntax > otherwise? Sage is not a clone of MMA or Maple, so their syntax does > not work. > > > Best regards, > > Michel > > Cheers, > > Michael --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
