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.TH Csagrid 3NCARG "January 1999" UNIX "NCAR GRAPHICS"
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.SH NAME
csagrid \- cubic spline approximation 
.SH DESCRIPTION
Csagrid is a software package in the ngmath library that implements a 
cubic spline approximation algorithm to fit a function to input data. 
The input for the approximation is a set of randomly-spaced data. These 
data may be one-dimensional, two-dimensional, or three-dimensional. 
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The output is a set of values at coordinates on a user-specified grid, 
or at a set of user-specified points (including at a single point). 
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Functionally equivalent Fortran, C, and NCL interfaces are provided. 
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Csagrid is based on the work of David Fulker and his package Splpack. 
.SH SYNOPSIS
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Fortran one-dimensional input
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-----------------------------
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 CSA1S        -  simple entry
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 CSA1XS       - expanded entry
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Fortran two-dimensional input
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-----------------------------
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 CSA2S        - simple entry, gridded output
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 CSA2XS       - expanded entry, gridded output
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 CSA2LS       - simple entry, list output
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 CSA2LXS      - expanded entry, list output
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Fortran three-dimensional input
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-----------------------------
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 CSA3S        - simple entry, gridded output
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 CSA3XS       - expanded entry, gridded output
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 CSA3LS       - simple entry, list output
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 CSA3LXS      - expanded entry, list output
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C one-dimensional input
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-----------------------------
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 c_csa1s        -  simple entry
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 c_csa1xs       - expanded entry
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C two-dimensional input
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-----------------------------
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 c_csa2s        - simple entry, gridded output
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 c_csa2xs       - expanded entry, gridded output
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 c_csa2ls       - simple entry, list output
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 c_csa2lxs      - expanded entry, list output
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C three-dimensional input
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-----------------------------
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 c_csa3s        - simple entry, gridded output
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 c_csa3xs       - expanded entry, gridded output
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 c_csa3ls       - simple entry, list output
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 c_csa3lxs      - expanded entry, list output
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NCL one-dimensional input
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-----------------------------
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 csa1s        -  simple entry
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 csa1xs       - expanded entry
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NCL two-dimensional input
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-----------------------------
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 csa2s        - simple entry, gridded output
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 csa2xs       - expanded entry, gridded output
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 csa2ls       - simple entry, list output
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 csa2lxs      - expanded entry, list output
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NCL three-dimensional input
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-----------------------------
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 csa3s        - simple entry, gridded output
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 csa3xs       - expanded entry, gridded output
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 csa3ls       - simple entry, list output
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 csa3lxs      - expanded entry, list output
.SH ACCESS 
To use Csagrid entries, load the NCAR Graphics library ngmath.
.SH SEE ALSO
csagrid,
csa1s,
csa1xs,
csa2s,
csa2xs,
csa2ls,
csa2lxs,
csa3s,
csa3xs,
csa3ls,
csa3lxs,
c_csa1s,
c_csa1xs,
c_csa2s,
c_csa2xs,
c_csa2ls,
c_csa2lxs,
c_csa3s,
c_csa3xs,
c_csa3ls,
c_csa3lxs.
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Complete documentation for Csagrid is available at URL
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http://ngwww.ucar.edu/ngdoc/ng/ngmath/csagrid/csahome.html
.SH COPYRIGHT
Copyright (C) 2000
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University Corporation for Atmospheric Research
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The use of this Software is governed by a License Agreement.