plotutils(1) [debian man page]

PLOTUTILS(1)							 Debian GNU/Linux						      PLOTUTILS(1)

NAME

       plotutils - The GNU plotting utilities.

DESCRIPTION

       plotutils does not have a full set of useful man pages.	Most of the documentation is available through the info system.  The relevant com-
       mand is "info plotutils".

Debian Project							  27th July 1998						      PLOTUTILS(1)

SPLINE(1)						      User's Reference Manual							 SPLINE(1)

NAME

       aspline - Akima spline interpolation

SYNOPSIS

       aspline [-a xstep] [-l llim] [-u ulim] [-n n] {file(s)}

DESCRIPTION

       aspline	reads pairs of numbers from the indicated file(s) (or from stdin if no files were given) as abscissas and ordinates of a function.
       It produces a similar set, which is approximately equally spaced and includes the input set on standard output. The  output  is	an  Akima-
       interpolated  spline which has an continuous first derivative.  The second derivate may be discontinuous, but the output does not wiggle as
       it would do with cubic splines.

       Datasets are separated by blank lines.

OPTIONS

       -a incr, --auto=incr
	      supply abscissas automatically, since 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 number.

       -l llim, --llimit=llim
	      set lower x-limit to llim,

       -u ulim, --ulimit=ulim
	      set upper x-limit to ulim,

       -n n, --points=n
	      space output points so that approx.  n intervals occur between the lower and upper limit,

       -v     be verbose,

       -h     print help message on stderr and exit.

SEE ALSO

       spline(1), gnuplot(1).

       H.  Akima, A New Method of Interpolation and Smooth Curve Fitting Based on Local Procedures, Journal of Assc. for Comp. Mach., Vol. 17, No.
       4, Oct. 1970, pp. 589--602

BUGS

       If you need a continuous second derivative, use spline from the plotutils package instead.

Debian								   January 1998 							 SPLINE(1)