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Steffen Müller >
Math-Approx-Symbolic >
Math::Approx::Symbolic

Module Version: 0.100
Math::Approx::Symbolic - Symbolic representation of interpolated polynomials

use Math::Approx::Symbolic; # ... use as you would use Math::Approx ... my $symbolic = $approximation->symbolic(); # ... $symbolic is now a Math::Symbolic object.

This module is a thin wrapper around the Math::Approx module. It subclasses Math::Approx and adds the "symbolic" subroutine that returns a Math::Symbolic object representing the calculated approximation.

None. Ever.

This is the only method added to the ones from Math::Approx. It takes an optional argument indicating the variable name to use for the symbolic representation of the approximation polynomial.

It returns a Math::Symbolic object representing the approximation polynomial.

use Math::Approx::Symbolic; sub poly { my($n,$x) = @_; return $x ** $n; } my %x; for (1..20) { $x{$_} = sin($_/10) * cos($_/30) + 0.3*rand; } my $approx = new Math::Approx::Symbolic (\&poly, 5, %x); $approx->print; print "Fit: ", $approx->fit, "\n\n"; my $function = $approx->symbolic('x'); # defaults to using variable 'x' without argument. print "$function\n"; print $function->value(x => $_),"\n" foreach keys %x; # Work with the symbolic function now.

(c) 2003 by Steffen Müller

Please send feedback, bug reports, and support requests to the author at approx-symbolic-module at steffen-mueller dot net

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

New versions of this module can be found on http://steffen-mueller.net or CPAN.

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