Acos Acosh Asin Asinh Atan2 Atanh Cosh Cospi Cospi_sub Exp2 Exp2_sub Expm1 Expm1_sub Log10 Log1p Log1p_sub Log2 Log2_sub Powm1 Powm1_sub Sinh Sinpi Sinpi_sub Sqrt1pm1 Sqrt1pm1_sub Tanh

Log2_sub() Sub Log2_sub ( Ret As  Double, X As  Double, Optional Info As  Long  ) log2(x) (base-2 logarithm of x) (Subroutine version) Purpose Computes the base-2 logarithm of x. Parameters [out] Ret log2(x). [in] X Argument x. (X > 0) [out] Info (Optional) = 0: Successful exit. = -1: The argument X had an illegal value. (X < 0) = 1: Floating point range error.