On Sun, Feb 5, 2012 at 11:16 PM, Asokan Pichai <pasokan at talentsprint.com> wrote: > Try changing > plot(x, v) > to > plot(x, v(x)) > > Asokan Pichai But your v(x) is probably in need of changing. I am answering from a machine with a small screen and no python Hence no definite statements. Asokan Pichai