Natgrid(3NCARG)

NAME
Natgrid is a package for gridding 2D randomly-spaced data using a natural neighbor algorithm. Single precison and double precision interfaces exist in both Fortran and C.

SYNOPSIS

FORTRAN single precision
------------------------

 NATGRIDS - primary function for gridding.
 NNSETI - set INTEGER parameter values.
 NNGETI - retrieve values for INTEGER parameters.
 NNSETR - set REAL parameter values.
 NNGETR - retrieve values for REAL parameters.
 NNSETC - set CHARACTER valued parameters.
 NNGETC - retrieve values for CHARACTER parameters.
 NNGETSLOPES - get slope values, if calculated.
 NNGETASPECTS - get aspect values, if calculated.
 NNPNTINITS - initiate single point mode.
 NNPNTS - interpolate at a single point.
 NNPNTEND - terminate single point mode.

Fortran double precision (not supported on UNICOS):
--------------------------------------------------

 NATGRIDD - primary function for gridding.
 NNSETI - set INTEGER parameter values.
 NNGETI - retrieve values for INTEGER parameters.
 NNSETRD - set DOUBLE PRECISION parameter values.
 NNGETRD - retrieve DOUBLE PRECISION parameters.
 NNSETC - set CHARACTER valued parameters.
 NNGETC - retrieve values for CHARACTER parameters.
 NNGETSLOPED - get slope values, if calculated.
 NNGETASPECTD - get aspect values, if calculated.
 NNPNTINITD - initiate single point mode.
 NNPNTD - interpolate at a single point.
 NNPNTENDD - terminate single point mode.

C single precision:
------------------

 c_natgrids - primary function for gridding.
 c_nnseti - set int parameter values.
 c_nngeti - retrieve values for int parameters.
 c_nnsetr - set float parameter values.
 c_nngetr - retrieve values for float parameters.
 c_nnsetc - set char valued parameters.
 c_nngetc - retrieve values for char parameters.
 c_nngetslopes - get slope values, if calculated.
 c_nngetaspects - get aspect values, if calculated.
 c_nnpntinits - initiate single point mode.
 c_nnpnts - interpolate at a single point.
 c_nnpntend - terminate single point mode.

C double precision:
------------------

 c_natgridd - primary function for gridding.
 c_nnseti - set int parameter values.
 c_nngeti - retrieve values for int parameters.
 c_nnsetrd - set double parameter values.
 c_nngetrd - retrieve values for double parameters.
 c_nnsetc - set char valued parameters.
 c_nngetc - retrieve values for char parameters.
 c_nngetsloped - get slope values, if calculated.
 c_nngetaspectd - get aspect values, if calculated.
 c_nnpntinitd - initiate single point mode.
 c_nnpntd - interpolate at a single point.
 c_nnpntendd - terminate single point mode.

ACCESS
To use Natgrid entries, load the NCAR Graphics library ngmath.

SEE ALSO
Individual entries, natgrid_params, natgrid_errors.

Complete documentation for Natgrid is available at URL
http://ngwww.ucar.edu/ngdoc/ng/ngmath/natgrid/nnhome.html

An NCL (NCAR Command Language) interface also exists for Natgrid procedures.

COPYRIGHT
Copyright (C) 2000
University Corporation for Atmospheric Research
The use of this Software is governed by a License Agreement.