.help gsacpts Aug85 "Gsurfit Package"
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NAME
gsacpts -- accumulate an array of data points into the fit
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SYNOPSIS
include <math/gsurfit.h>

gsacpts (sf, x, y, z, weight, npts, wtflag)

.nf
pointer	sf		# surface descriptor
real	x[npts]		# x values, xmin <= x <= xmax
real	y[npts]		# y values, ymin <= y <= ymax
real	z[npts]		# z values
real	weight[npts]	# array of weights
int	npts		# the number of data points
int	wtflag		# type of weighting
.fi
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ARGUMENTS
.ls sf      
Pointer to the surface descriptor structure.
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.ls x, y
Array of x and y values.
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.ls z      
Array of data values.
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.ls weight
The weights assigned to the data points.
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.ls npts
The number of data points.
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.ls wtflag
Type of weighting. The options are WTS_USER and WTS_UNIFORM. If wtflag
equals WTS_USER the weight for each data point is supplied by the user.
If wtflag equals WTS_UNIFORM the routine sets the weight to 1.
The weight definitions are contained in the package header file gsurfit.h.
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DESCRIPTION
GSACCUM calculates the non-zero basis functions for the given x and
y values, computes the contribution of each data point to the normal
equations and sums that contribution into the appropriate arrays and
vectors.
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NOTES
Checking for out of bounds x and y values and INDEF valued data points is
the responsibility of the calling program.
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SEE ALSO
gsaccum, gsfit, gsrefit
.endhelp