from pylab import * from matplotlib.widgets import Button freqs = arange(2,20,3) ax = subplot(111) subplots_adjust(bottom=0.2) t = arange(0.0, 1.0, 0.001) s = sin(2*pi*freqs[0]*t) l, = plot(t,s, lw=2) class Index: ind = 0 def next(self, event): self.ind += 1 i = self.ind%len(freqs) ydata = sin(2*pi*freqs[i]*t) l.set_ydata(ydata) draw() def prev(self, event): self.ind -= 1 i = self.ind%len(freqs) ydata = sin(2*pi*freqs[i]*t) l.set_ydata(ydata) draw() callback = Index() axprev = axes([0.7, 0.05, 0.1, 0.075]) axnext = axes([0.81, 0.05, 0.1, 0.075]) bnext = Button(axnext, 'Next') bnext.on_clicked(callback.next) bprev = Button(axprev, 'Previous') bprev.on_clicked(callback.prev) show()