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[r2807]: / trunk / course / examples / scipy / roots1d.py Maximize Restore History

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import scipy as S
import pylab as P

coefs = [  1. ,  -3.5,  -0.5,  11. , -17. ,   6. ]

pol = S.poly1d(coefs)

x = P.frange(-4,4,npts=400)
y = pol(x)

P.figure()
P.plot(x,y)
P.axhline(0)
P.ylim(-100,100)

print 'Coefficients of p(x):',coefs
print 'Roots of p(x):',pol.r

P.show()