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.TH XFIT 3M
.SH NAME
xfit
.SH DESCRIPTION
subroutine xfit.f
source
Bevington, page 76.
purpose
calculate mean and estimated errors for set of data points
usage
call xfit (x, sigmax, npts, mode, xmean, sigmam, sigma)
description of parameters
x - array of data points
sigmax - array of standard deviations for data points
npts - number of data points
mode - determines method of weighting
+1 (instrumental) weight(i) = 1./sigmax(i)**2
0 (no weighting) weight(i) = 1.
-1 (statistical) weight(i) = 1.
xmean - weighted mean
sigmam - standard deviation of mean
sigma - standard deviation of data
subroutines and function subprograms required
none
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