=head1 NAME

PDL::Opt::QP - Quadratic programming solver for PDL

=head1 SYNOPSIS

    use PDL;
    use PDL::NiceSlice;
    use PDL::Opt::QP;

    my $mu   = pdl(q[ 0.0427 0.0015 0.0285 ])->transpose; # [ n x 1 ]
    my $mu_0 = 0.0427;
    my $dmat = pdl q[ 0.0100 0.0018 0.0011 ;
                      0.0018 0.0109 0.0026 ;
                      0.0011 0.0026 0.0199 ];
    my $dvec = zeros(3);
    my $amat = $mu->glue( 0, ones( 1, 3 ) )->copy;
    my $bvec = pdl($mu_0)->glue( 1, ones(1) )->flat;
    my $meq  = pdl(2);

    my $sol = qp( $dmat, $dvec, $amat, $bvec, $meq );
    say "Solution: ", $sol->{x};

=head1 DESCRIPTION

This routine uses Goldfarb/Idnani algorithm to solve the
following minimization problem:

           minimize  f(x) = 0.5 * x' D x  -  d' x
              x

    optionally constrained by:

            Aeq'  x  = a_eq
            Aneq  x >= b_neq


=cut

=head1 FUNCTIONS




=cut

=head2 qpgen2

=for sig

  Signature: (dmat(m,m); dvec(m);
        [o]sol(m); [o]lagr(q); [o]crval();
        amat(m,q); bvec(q); int meq();
        int [o]iact(q); int [o]nact();
        int [o]iter(s=2); [t]work(z); int [o]ierr();
    )



=for ref

This routine solves the quadratic programming optimization problem

           minimize  f(x) = 0.5 x' D x  -  d' x
              x

    optionally constrained by:

            Aeq'  x  = a_eq
            Aneq  x >= b_neq


.... more docs to come ....


=for bad

qpgen2 ignores the bad-value flag of the input piddles.
It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.



=cut

=head1 SEE ALSO

L<PDL>, L<PDL::Opt::NonLinear>

=head1 BUGS

Please report any bugs or suggestions at L<http://rt.cpan.org/>

=head1 AUTHOR

Mark Grimes, E<lt>mgrimes@cpan.orgE<gt>

=head1 COPYRIGHT AND LICENSE

This software is copyright (c) 2014 by Mark Grimes, E<lt>mgrimes@cpan.orgE<gt>.

This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.


=cut