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from matplotlib.matlab import * t = arange(0.0, 2.0, 0.01) s1 = sin(2*pi*t) s2 = sin(2*2*pi*t) plot(t, s1, 'r-', t, s2, 'g--') legend( ('Signal1', 'Signal2') ) xlabel('time') ylabel('volts') savefig('test.ps') title('This is a recording') show()