XLPack 7.0
XLPack Numerical Library (Excel VBA) Reference Manual
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◆ Alegendre()

Function Alegendre ( N As  Long,
M As  Long,
X As  Double,
Optional Info As  Long 
)

Associated Legendre polynomial Pnm(x)

Purpose
Computes the associated Legendre polynomial.
Pnm(x) = (-1)^m (1 - x^2)^(m/2) dm/dxm Pn(x)
Note that the term (-1)^m may not be included depending on the definition.
Returns
Double
Associated Legendre polynomial Pnm(x).
Parameters
[in]NArgument n. (0 <= N < 128)
[in]MArgument m. (0 <= M <= N)
[in]XArgument x (|X| <= 1).
[out]Info(Optional)
= 0: Successful exit.
= -1: The argument N had an illegal value. (N < 0, N >= 128)
= -2: The argument M had an illegal value. (M < 0, M > N)
= -3: The argument X had an illegal value. (|X| > 1)
= 1: Floating point range error.
Reference
boost/math/special_functions