.TH PCORRE 3M
.SH NAME
pcorre
.SH DESCRIPTION
function pcorre.f

source
  Bevington, pages 124-125.

purpose
  evaluate probability of no correlation between 2 variables

usage
  result = pcorre (r, npts)

description of parameters
  r      - linear correlation coefficient
  npts   - number of data points

subroutines and function subprograms required
  gamma (x)
    calculates gamma function for integers and 1/2-integers