NAME

       fitgrid - interpolate 1d and 2d data

DESCRIPTION

       Fitgrid is a package for interpolating one dimensional and two dimensional data. The package has the
       following functionality:

       1.) Interpolating single-valued functions in one dimension.
       2.) Interpolating parametric curves in the plane.
       3.) Computing an interpolatory surface through a rectangular grid of functional values.
       4.) Interpolating periodic functions in one dimension.
       5.) Finding integrals and derivatives of interpolated functions.

SYNOPSIS

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

        CURV1   -  does set-up for CURV2.
        CURV2   -  1D interpolation for non-periodic functions.
        CURVD   -  derivatives for 1D functions.
        CURVI   -  integrals for 1D functions.
        CURVP1  -  does set-up for CURVP2 .
        CURVP2  -  1D interpolation for periodic functions.
        CURVPI  -  integrals for periodic functions.
        CURVS   -  does smoothing and set-up for CURV2.
        CURVPS  -  does smoothing for periodic functions.
        KURV1   -  does set-up for KURV2.
        KURV2   -  interpolation for parametric curves.
        KURVD   -  derivatives for parametric curves.
        KURVP1  -  set-up for KURVP2.
        KURVP2  -  interpolation for closed parametric curves.
        KURVPD  -  derivatives for closed parametric curves.
        SURF1   -  set-up for SURF2.
        SURF2   -  2D interpolation for gridded data.

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

        c_ftcurv    -  1D interpolation for non-periodic functions.
        c_ftcurvd   -  derivatives for 1D functions.
        c_ftcurvi   -  integrals for 1D functions.
        c_ftcurvp   -  1D interpolation for periodic functions.
        c_ftcurvpi  -  integrals for periodic functions.
        c_ftcurvs   -  does smoothing for non-periodic functions.
        c_ftcurvps  -  does smoothing for periodic functions.
        c_ftkurv    -  interpolation for parametric curves.
        c_ftkurvp   -  interpolation for closed parametric curves.
        c_ftkurvd   -  derivatives for parametric curves.
        c_ftkurvpd  -  interpolation for closed parametric curves.
        c_ftsurf    -  2D interpolation for rectangular data.
        c_ftseti    -  set values for int parameters.
        c_ftgeti    -  get values for int parameters.
        c_ftsetr    -  set values for float parameters.
        c_ftgetr    -  get values for float parameters.
        c_ftsetc    -  set values for string parameters.
        c_ftgetc    -  get values for string parameters.
        c_ftsetfa   -  set values for float arrays.
        c_ftgetfa_size  -  get array size of float array.
        c_ftgetfa_data  -  get float array data.

ACCESS

       To use fitgrid entries, load the NCAR Graphics library ngmath.

SEE ALSO

       Individual entries, fitgrid_params

       Complete documentation for fitgrid is available at URL
       http://ngwww.ucar.edu/ngdoc/ng/ngmath/fitgrid/fithome.html

COPYRIGHT

       Copyright (C) 2000
       University Corporation for Atmospheric Research

       The use of this Software is governed by a License Agreement.

UNIX                                               March 1998                                    Fitgrid(3NCARG)