cross-posting
---------- Forwarded message ---------- From: D.C. Ernst <ernst.tr...@gmail.com> Date: Fri, Jul 29, 2011 at 2:36 PM Subject: [sage-edu] batman logo To: sage-edu <sage-...@googlegroups.com> A student of mine just sent me the following batman logo: http://i.imgur.com/CNy9J.jpg I can't seem plot this using Sage. Here is what I tried: var('x y') f(x,y)=((x/7)^2*sqrt(abs(abs(x)-3)/(abs(x)-3))+(y/3)^2*sqrt(abs(y +(3*sqrt(33))/7)/(y+(3*sqrt(33))/7))-1)*(abs(x/2)-((3*sqrt(33)-7)/ 112)*x^2-3+sqrt(1-(abs(abs(x)-2)-1)^2)- y)*(9*sqrt(abs((abs(x)-1)*(abs(x)-3/4))/((1- abs(x))*(abs(x)-3/4)))-8*abs(x)-y)*(3*abs(x)+. 75*sqrt(abs((abs(x)-3/4)*(abs(x)-1/2))/((3/4-abs(x))*(abs(x)-1/2)))- y)*(9/4*sqrt(abs((x-1/2)*(x+1/2))/((1/2-x)*(1/2+x)))-y)*((6*sqrt(10))/ 7+(3/2-abs(x)/2)*sqrt(abs(abs(x)-1)/(abs(x)-1))-(6*sqrt(10))/14*sqrt(4- (abs(x)-1)^2)-y) implicit_plot(f,(-6,6),(-6,6)) I don't get any errors, but the plot appears empty. By the way, I didn't type the expression above, but I did briefly scan it for accuracy. Maybe it doesn't actually work... Dana -- You received this message because you are subscribed to the Google Groups "sage-edu" group. To post to this group, send email to sage-...@googlegroups.com. To unsubscribe from this group, send email to sage-edu+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sage-edu?hl=en. -- 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 URL: http://www.sagemath.org
