Dawson Erf Erfc Erfci Erfi Fresc Fress

Erfi() Function Erfi ( P As  Double, Optional Info As  Long  ) Error function erf(x) inverse Purpose This routine returns a value x such that p = erf(x), where p is the specified value of the error function. Returns Double Value of x. Parameters [in] P Argument p. (-1 < P < 1) [out] Info (Optional) = 0: Successful exit. = -1: The argument P had an illegal value. (P <= -1 or P >= 1) = 1: Floating point range error. Reference boost/math/special_functions