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numpy.polynomial.chebyshev.chebsub(c1, c2)
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Subtract one Chebyshev series from another.
Returns the difference of two Chebyshev series
c1
-c2
. The sequences of coefficients are from lowest order term to highest, i.e., [1,2,3] represents the seriesT_0 + 2*T_1 + 3*T_2
.Parameters: c1, c2 : array_like
1-D arrays of Chebyshev series coefficients ordered from low to high.
Returns: out : ndarray
Of Chebyshev series coefficients representing their difference.
Notes
Unlike multiplication, division, etc., the difference of two Chebyshev series is a Chebyshev series (without having to ?reproject? the result onto the basis set) so subtraction, just like that of ?standard? polynomials, is simply ?component-wise.?
Examples
>>> from numpy.polynomial import chebyshev as C >>> c1 = (1,2,3) >>> c2 = (3,2,1) >>> C.chebsub(c1,c2) array([-2., 0., 2.]) >>> C.chebsub(c2,c1) # -C.chebsub(c1,c2) array([ 2., 0., -2.])
numpy.polynomial.chebyshev.chebsub()
2017-01-10 18:16:41
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