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numpy.polynomial.legendre.legsub(c1, c2)
[source] -
Subtract one Legendre series from another.
Returns the difference of two Legendre series
c1
-c2
. The sequences of coefficients are from lowest order term to highest, i.e., [1,2,3] represents the seriesP_0 + 2*P_1 + 3*P_2
.Parameters: c1, c2 : array_like
1-D arrays of Legendre series coefficients ordered from low to high.
Returns: out : ndarray
Of Legendre series coefficients representing their difference.
Notes
Unlike multiplication, division, etc., the difference of two Legendre series is a Legendre 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 legendre as L >>> c1 = (1,2,3) >>> c2 = (3,2,1) >>> L.legsub(c1,c2) array([-2., 0., 2.]) >>> L.legsub(c2,c1) # -C.legsub(c1,c2) array([ 2., 0., -2.])
numpy.polynomial.legendre.legsub()
2017-01-10 18:17:35
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