from pylab import *
font = {'fontname' : 'Courier',
'color' : 'r',
'fontweight' : 'bold',
'fontsize' : 11}
t = arange(0.0, 5.0, 0.1)
plot(t, cos(2*pi*t)*exp(-t), '-ko', mfc='b')
title('Damped exponential decay', font, fontsize=12)
text(2, 0.65, r'\rm{cos}(2 \pi t) \rm{exp}(-t)', font, color='k')
xlabel('time (s)', font)
ylabel('voltage (mV)', font)
show()