Thx Seb! 2011/12/14 Benjamin Root <ben.r...@ou.edu>: > > > On Wednesday, December 14, 2011, Fabien Lafont <lafont.fab...@gmail.com> > wrote: >> I have a basic problem (I think) >> >> I try to fit some data with this function >> >> http://docs.scipy.org/doc/numpy/reference/generated/numpy.polynomial.Chebyshev.fit.html >> >> But it return an error: >> >> fit = chebyshev.fit(T,R,3) >> NameError: name 'chebyshev' is not defined >> >> I don't understand I've imported Numpy and polynomials... An Idea? >> >> >> import math >> from numpy import * >> from numpy import polynomial >> from pylab import * >> from scipy import * >> from scipy import optimize >> import warnings >> warnings.simplefilter('ignore', np.RankWarning) >> >> >> R = [ 9011.5 , 7822.7 , 6253.9 , 4877.56 , 3892.08 , >> 3221.41 , 2647.05, >> 2260.94 , 1959.72 , 1712.06 , 1522.28 , 1367.87 , 1242.953 >> , 1185.092, >> 1104.452 , 1031.862 , 919.8644 , 832.9942 , 767.8944 , 715.1569, >> 671.6301 , 635.1634 , 604.284 , 577.5536] >> >> T = range(0,len(R)) >> plot (T,R,".") >> show() >> fit = chebyshev.fit(T,R,3) >> print fit >> > > The function would be in the "polynomial" namespace. So > "polynomial.chebyshev()" would work. To reduce typing, you can import a > module "as" some other name. > > from numpy import polynomial as poly > > .. > > fit = poly.chebyshev.fit(T,R,3) > > Importing modules is very flexible and I suggest reading up on it. > > Ben Root
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