From fa080de7afc95aa1c19a6e6fc0e0708ced2eadc4 Mon Sep 17 00:00:00 2001
From: Joseph Hunkeler <jhunkeler@gmail.com>
Date: Wed, 8 Jul 2015 20:46:52 -0400
Subject: Initial commit

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 math/surfit/doc/isinit.hlp | 61 ++++++++++++++++++++++++++++++++++++++++++++++
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+.help isinit Apr85 "Surfit Package"
+.ih
+NAME
+isinit -- initialize surface grid descriptor
+.ih
+SYNOPSIS
+include <math/surfit.h>
+
+.nf
+isinit (sf, surface_type, xorder, yorder, xterms, ncols, nlines)
+.fi
+
+.nf
+pointer	sf		# surface descriptor
+int	surface_type	# surface function
+int	xorder		# order of function in x
+int	yorder		# order of function in y
+int	xterms		# include cross-terms? (YES/NO)
+int	ncols		# number of columns in the surface grid
+int	nlines		# number of lines in the surface grid
+.fi
+.ih
+ARGUMENTS
+.ls sf    
+Pointer to the surface descriptor structure.
+.le
+.ls surface_type
+Fitting function. Permitted values are SF_LEGENDRE and SF_CHEBYSHEV for
+the Legendre and Chebyshev polynomials and SF_SPLINE1 and SF_SPLINE3
+for the linear and bicubic splines.
+.le
+.ls xorder, yorder
+Order of the polynomial to be fit in x and y or the number of spline pieces to 
+be fit in x and y. The orders must be greater than or equal to 1.
+.le
+.ls xterms
+Include cross-terms? If xterms = YES coefficients are fit to terms containing
+the cross products of x and y polynomials. Xterms defaults to YES for the
+spline functions.
+.le
+.ls ncols
+The number of columns in the surface grid. The surface is assumed to lie
+on a rectangular grid such that 1 <= x <= ncols.
+.le
+.ls nlines
+The number of lines in the surface to be grid. The surface is assumed to lie
+on a rectangular grid such that 1 <= y <= nlines.
+.le
+.ih
+DESCRIPTION
+ISINIT allocates space for the surface descriptor and the arrays and vectors
+used by the numerical routines. It initializes all arrays and vectors to zero,
+calculates and stores the basis functions in x and y
+and returns the surface descriptor to the calling routine.
+.ih
+NOTES
+ISINIT must be the first SURFIT routine called.
+.ih
+SEE ALSO
+isfree
+.endhelp
-- 
cgit 

