Math::LP::LinearCombination - linear combination of Math::LP::Variable objects
use Math::LP::LinearCombination; # first construct some variables $x1 = new Math::LP::Variable(name => 'x1'); $x2 = new Math::LP::Variable(name => 'x2'); # build x1 + 2 x2 from an empty linear combination $lc1 = new Math::LP::LinearCombination; $lc1->add_entry(var => $x1, coeff => 1.0); $lc1->add_entry(var => $x2, coeff => 2.0); # alternatively, make x1 + 2 x2 in one go $lc2 = make Math::LP::LinearCombination($x1, 1.0, $x2, 2.0 );
Any client should not access any other field than the value field. This field contains the value of the linear combination, typically obtained in calculate_value(), but it may be set elsewhere (e.g. by the solve() function in Math::LP).
value
The following methods are available:
returns a new, empty linear combination
returns a new linear combination initialized with the given variables and coefficients. A ref to an array of variables and coefficients is also accepted as a legal argument.
adds a variable to the linear combination with the given coefficient
calculates the value of the linear combination. The value is also stored in the value field. Requires that the values of all variables are defined.
The base class of Math::LP::LinearCombination is documented in Math::LinearCombination
The usage of variables is documented in Math::LP::Variable and Math::LP::SimpleVariable
The interaction with other classes for solving linear programs is described in Math::LP
Wim Verhaegen <wimv@cpan.org>
Copyright(c) 2000-2001 Wim Verhaegen. All rights reserved. This program is free software; you can redistribute and/or modify it under the same terms as Perl itself.
To install Math::LP, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Math::LP
CPAN shell
perl -MCPAN -e shell install Math::LP
For more information on module installation, please visit the detailed CPAN module installation guide.