Re: [sage-support] plotting countour lines

Hi Robert, On Tue, 16 Feb 2010 06:19:41 -0800 (PST) "ma...@mendelu.cz" wrote: > Dear sage-support > > the following plot works > > x,y=var('x,y') > contour_plot(sqrt(1-(x^2+y)^2),(x,-2,2),(y,-2,0), fill=False, > labels=True) > > but the following not: > > x,y=var('x,y') > contour_plot(ln(1-(

[sage-support] plotting countour lines

Dear sage-support the following plot works x,y=var('x,y') contour_plot(sqrt(1-(x^2+y)^2),(x,-2,2),(y,-2,0), fill=False, labels=True) but the following not: x,y=var('x,y') contour_plot(ln(1-(x^2+y)^2),(x,-2,2),(y,-2,0), fill=False, labels=True) I get Traceback (click to the left of this block f