This module contains routines used in the percentile matching algorithm for the albedo and vegetation fraction perturbations. More...
Functions/Subroutines | |
subroutine, public | surface_perturbation::cdfnor (z, cdfz) |
This subrtouine calculates the CDF of the standard normal distribution evaluated at z. More... | |
subroutine | surface_perturbation::cdfgam (x, alpha, eps, iflag, cdfx) |
subroutine | surface_perturbation::dgamln (x, dgamlnout) |
subroutine, public | surface_perturbation::ppfbet (pr, p, q, iflag, x) |
This subroutine computes the beta distribution value that matches the percentile from the random pattern. More... | |
subroutine | surface_perturbation::cdfbet (x, p, q, eps, iflag, cdfx) |
This subroutine computes the value of the cumulative beta distribution at a single point x, given the distribution parameters p,q. More... | |
subroutine | surface_perturbation::gmln (x, y) |
This subroutine computes the natural logarithm of the gamma distribution. Users can set the absolute accuracy and corresponding xmin. More... | |