Query: aspline
OS: debian
Section: 1
Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar
SPLINE(1) User's Reference Manual SPLINE(1)NAMEaspline - Akima spline interpolationSYNOPSISaspline [-a xstep] [-l llim] [-u ulim] [-n n] {file(s)}DESCRIPTIONaspline 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 ALSOspline(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--602BUGSIf you need a continuous second derivative, use spline from the plotutils package instead. Debian January 1998 SPLINE(1)
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