Provided by: libncarg-dev_6.1.2-7_amd64 bug

NAME
       CURV1 - does set-up for CURV2.


SYNOPSIS
       CALL CURV1 (N, X, Y, SLP1, SLPN, ISLPSW, YP, TEMP, SIGMA, IER)


DESCRIPTION
       N           (integer,input) The number of input data values. (N > 1)

       X           (real, input) An array containing the abscissae for the input function.

       Y           (real,  input)  An array containing the functional values of the input data --
                   (Y(K) is the functional value at X(K) for K=1,N).

       SLP1        (real, input) A user-specified value for  the  desired  slope  at  X(1).   See
                   ISLPSW below if you want to have a value calculated internally.

       SLPN        (real,  input)  A  user-specified  value  for  the desired slope at X(N).  See
                   ISLPSW below if you want to have a value calculated internally.

       ISLPSW      (integer, input) A switch to indicate whether the slopes  at  the  end  points
                   should be calculated internally.

                   = 0 if SLP1 and SLPN are user-specified.
                   = 1 if SLP1 is user-specified, but SLPN is internally calculated.
                   = 2 if SLPN is user-specified, but SLP1 is internally calculated.
                   = 3 if SLP1 and SLPN are internally calculated.

       YP          (real,  output)  Contains  values  for  the  second derivative (CURV1 computes
                   these).

       TEMP        (real, input) Scratch space.

       SIGMA       (real, input) Tension factor. Values near zero result in a cubic spline; large
                   values (e.g. 50) result in nearly a polygonal line.  A typical value is 1.

       IER         (integer,  output)  An  error  return  value. If IER is returned as 0, then no
                   errors were detected.

                   = 1 if N is less than 2.
                   = 2 if X values are not strictly increasing.


ACCESS
       To use CURV1, load the NCAR Graphics library ngmath.


SEE ALSO
       curv2, 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.