NAME

       Math::Derivative - Numeric 1st and 2nd order differentiation

SYNOPSIS

           use Math::Derivative qw(Derivative1 Derivative2);
           @dydx=Derivative1(\@x,\@y);
           @d2ydx2=Derivative2(\@x,\@y);
           @d2ydx2=Derivative2(\@x,\@y,$yp0,$ypn);

DESCRIPTION

       This Perl package exports functions for performing numerical first (Derivative1) and
       second Derivative2) order differentiation on vectors of data. They both take references to
       two arrays containing the x and y ordinates of the data and return an array of the 1st or
       2nd derivative at the given x ordinates. Derivative2 may optionally be given values to use
       for the first dervivative at the start and end points of the data - otherwiswe 'natural'
       values are used.

HISTORY

       $Log: Derivative.pm,v $ Revision 1.1  1995/12/26 16:26:59  willijar Initial revision

BUGS

       Let me know.

AUTHOR

       John A.R. Williams <J.A.R.Williams@aston.ac.uk>