Hector Villafuerte wrote: > Hi, > I would like to plot the gradient (i.e. vector field) of functions > such as f(x,y) = exp(-(x^2 + y^2)); in this case: > grad(f(x,y)) = vector([ -2*x*exp(-(x^2 + y^2)), -2*y*exp(-(x^2 + y^2)) ]) > > Initially I tried with plot_vector_field, but as of now it just "takes > two functions of one variable". For my second attempt I used > matplotlib, as indicated below (also, see attached plots). > > So my question: is there a SAGEly way to plot this type of vector fields? > Thanks in advance!
There is now! It turned out to be a pretty simple fix to plot_vector_field; see http://trac.sagemath.org/sage_trac/ticket/2381 Here's an example: sage: x,y=var('x y') sage: f(x,y) = exp(-(x^2+y^2)) sage: grad_f = [diff(f,var) for var in (x,y)] sage: plot_vector_field(grad_f, (-2,2), (-2,2)) Thanks, Jason --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@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-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
