if you remove 'adaptive=True' then it works---so probably you're hitting a bug in computing the best box to plot, or something like this.
On Tuesday, January 3, 2017 at 12:39:05 PM UTC, Fjordforsk A/S wrote: > > I compared Wolfram Alpha online and SAGE just to see, and it gives a > strange result: > > Wolfram plots the function as given : > > > https://www.wolframalpha.com/input/?i=plot+(1%2Bx*(e%5E(x%2Bt%2B1)%2Be%5E(2*x%2B2*t%2B2)-(x%5E2*(I*x-t)%2F(2x%2Bt%2B2))*e%5E(3*x%2B3*t%2B3)) > > > while SAGE with command: plot3d(lambda > x,t:(1+x*(e^(x+t+1)+e^(2*x+2*t+2)-(x^2*(I*x-t)/(x+t+2))*e^(3*x+3*t+3))).real_part(),(x,-3*pi,3*pi),(t,-4,4),adaptive=True,color=cmsel) > > gives: > > ZeroDivisionError: Symbolic division by zero > > > That is a logically strange result. May one of the two be wrong? > > > > tirsdag 3. januar 2017 13.24.58 UTC+1 skrev Dima Pasechnik følgende: >> >> >> >> On Tuesday, January 3, 2017 at 12:02:41 PM UTC, Fjordforsk A/S wrote: >>> >>> Hello, I get an idle response from SAGE when trying to plot this: >>> >>> var('x t'); >>> cmsel = [colormaps['gnuplot2'](i) for i in sxrange(0,1,0.02)] >>> plot3d(lambda >>> x,t:(1+x*(e^(x+t+1)+e^(2*x+2*t+2)-(x^2*(I*x^2-t)/(x^3+t^2+2))*e^(3*x+3*t+3)).imag_part(),(x,-3*pi,3*pi),(t,-2,2),adaptive=True,color=cmsel) >>> >> >> one missing ')' before .imag_part() >> >> Then it works for me. >> > -- 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 [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
