Besi0 Besi0_sub Besi1 Besi1_sub Besin Besin_sub Besind Besind_sub Besinu Besinu_sub Besinud Besinud_sub Besk0 Besk0_sub Besk1 Besk1_sub Beskn Beskn_sub Besknd Besknd_sub Besknu Besknu_sub Besknud Besknud_sub Cbesi Cbesk Sbesin Sbesin_sub Sbesinu Sbesinu_sub Sbeskn Sbeskn_sub Sbesknu Sbesknu_sub

Besinu_sub() Sub Besinu_sub ( Ret As  Double, Nu As  Double, X As  Double, Optional Info As  Long  ) Modified Bessel function of the first kind of order ν Iν(x) (fractional order) (Subroutine version) Purpose Computes the modified Bessel function of the first kind of order ν Iν(x). Parameters [out] Ret Modified Bessel function of the first kind of order ν Iν(x). [in] Nu Order ν. [in] X Argument x. (X >= 0 if ν is not an integer) [out] Info (Optional) = 0: Successful exit. = -2: The argument X had an illegal value. (X < 0 when ν is not an integer) = 1: Floating point range error. Reference boost/math/special_functions