DOUBLE PRECISION FUNCTION DERZL ( Z, VL )

Argument Definitions (+ indicates altered content)
DOUBLE PRECISION   VL,         Z
Description
compute the derivative of the box-cox transformation z(lambda) 
with respect to lambda, where vl is a value of lambda.
Source file:derzl.f
Intrinsic Functions Called
DOUBLE PRECISION   DABS,       DLOG
External Functions and Subroutines Called
DOUBLE PRECISION   ZLAM