57877615f5
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24 lines
628 B
Python
Executable file
24 lines
628 B
Python
Executable file
#!/usr/bin/env python
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#
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# Make a legend for specific lines.
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from pylab import *
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t1 = arange(0.0, 2.0, 0.1)
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t2 = arange(0.0, 2.0, 0.01)
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# note that plot returns a list of lines. The "l1, = plot" usage
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# extracts the first element of the list inot l1 using tuple
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# unpacking. So l1 is a Line2D instance, not a sequence of lines
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l1, = plot(t2, exp(-t2))
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l2, l3 = plot(t2, sin(2*pi*t2), '--go', t1, log(1+t1), '.')
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l4, = plot(t2, exp(-t2)*sin(2*pi*t2), 'rs-.')
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legend( (l2, l4), ('oscillatory', 'damped'), 'upper right', shadow=True)
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xlabel('time')
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ylabel('volts')
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title('Damped oscillation')
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#axis([0,2,-1,1])
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show()
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