legsub(c1, c2)
Returns the difference of two Legendre series :None:None:`c1`
- :None:None:`c2`
. The sequences of coefficients are from lowest order term to highest, i.e., [1,2,3] represents the series P_0 + 2*P_1 + 3*P_2
.
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."
1-D arrays of Legendre series coefficients ordered from low to high.
Of Legendre series coefficients representing their difference.
Subtract one Legendre series from another.
>>> 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.])See :
The following pages refer to to this document either explicitly or contain code examples using this.
numpy.polynomial.legendre.legpow
numpy.polynomial.legendre.legmul
numpy.polynomial.legendre.legdiv
numpy.polynomial.legendre.legadd
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