spline(1) — CLIX 3.1r7.6.28



  spline(1)                           CLIX                           spline(1)



  NAME

    spline - Interpolates a smooth curve

  SYNOPSIS

    spline [flags]

    -a   Supply abscissas automatically (they are missing from the input);
         spacing is given by the next argument, or is assumed to be 1 if next
         argument is not a numbé'
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                        '' = kyn-1
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    -n   S
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pace output points so that approximately n intervals occur between
         the lower and upper x limits (default n = 100).

    -o   Make output periodic, that is, match derivatives at ends.  First and
         last input values should normally agree.

    -x   Next 1 (or 2) arguments are lower (and upper) x limits.  Normally,
         these limits are calculated from the data.  The automatic abscissas
         start at the lower limit (default 0).

  DESCRIPTION

    The spline command takes pairs of numbers from stdin as abscissas and
    ordinates of a function.  It produces a similar set, which is
    approximately equally spaced and includes the input set, on stdout.  The
    cubic spline output has two continuous derivatives, and sufficiently many
    points to look smooth when plotted, for example by graph.

  EXAMPLES

    To generate output using the spline command , enter a command line similar
    to the following:

    spline < budget.data | graph | tplot


  NOTES

    A limit of 1,000 input points is enforced silently.

  DIAGNOSTICS

    When data is not strictly monotone in x, the spline command reproduces the



  2/94 - Intergraph Corporation                                              1







  spline(1)                           CLIX                           spline(1)



    input without interpolating extra points.

  EXIT VALUES

    The spline command exits with a value of 0 if successful and a value of 1
    if there is a problem with one of the input arguments.

  RELATED INFORMATION

    Commands: graph(1)












































  2                                              Intergraph Corporation - 2/94

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