.help issave Apr85 "Surfit Package"
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NAME
issave - save the surface fit
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SYNOPSIS
issave (sf, fit)

.nf
pointer	sf		# surface descriptor
real	fit[ARB]	# fit array
.fi
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ARGUMENTS
.ls sf   
Pointer to the surface grid descriptor.
.le
.ls fit
Array for storing the fit. The fit array must be at least SAVE_COEFF + ncoeff
elements long.
.le

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DESCRIPTION
ISSAVE stores the surface parameters and coefficient array
in the 1-D reall array fit. Fit must be at least ncoeff + SAVE_COEFF
elements long where ncoeff is defined as follows.

.nf
	SF_LEGENDRE:		nxcoeff = xorder
				nycoeff = yorder
				ncoeff = xorder * yorder        xterms = yes
				ncoeff = nycoeff + nxcoeff - 1  xterms = no

	SF_CHEBYSHEV:		nxcoeff = xorder
				nycoeff = yorder
				ncoeff = xorder * yorder        xterms = yes
				ncoeff = nycoeff + nxcoeff - 1  xterms = no

	SF_SPLINE3:		nxcoeff = xorder + 3
				nycoeff = yorder + 3
				ncoeff = (xorder + 3) * (yorder + 3)

	SF_SPLINE1:		nxcoeff = xorder + 1
				nycoeff = yorder + 1
				ncoeff = (xorder + 1) * (yorder + 1)

.fi

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NOTES
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SEE ALSO
isreplace
.endhelp