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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()
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