# Copyright 2011, 2012, 2013, 2014 Kevin Ryde
# This file is part of Math-NumSeq.
#
# Math-NumSeq is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 3, or (at your option) any later
# version.
#
# Math-NumSeq is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# for more details.
#
# You should have received a copy of the GNU General Public License along
# with Math-NumSeq. If not, see <http://www.gnu.org/licenses/>.
package Math::NumSeq::Derived::Cumulative;
use 5.004;
use strict;
use POSIX 'ceil';
use List::Util 'max';
use vars '$VERSION','@ISA';
$VERSION = 69;
use Math::NumSeq;
@ISA = ('Math::NumSeq');
# uncomment this to run the ### lines
#use Smart::Comments;
use constant description => Math::NumSeq::__('Cumulative ...');
sub values_min {
my ($self) = @_;
return $self->{'sequence'}->values_min;
}
sub rewind {
my ($self) = @_;
$self->{'sum'} = 0;
$self->{'sequence'}->rewind;
}
sub next {
my ($self) = @_;
### Cumulative next()...
my ($i, $value) = $self->{'sequence'}->next();
return ($i, $self->{'sum'} += $value);
}
1;
__END__
=for stopwords Ryde
=head1 NAME
Math::NumSeq::Derived::Cumulative -- cumulative sum of a sequence
=head1 SYNOPSIS
use Math::NumSeq::Derived::Cumulative;
my $seq = Math::NumSeq::Derived::Cumulative->new
(sequence = $parent_sequence);
my ($i, $value) = $seq->next;
=head1 SEE ALSO
L<Math::NumSeq>
=head1 HOME PAGE
http://user42.tuxfamily.org/math-numseq/index.html
=head1 LICENSE
Copyright 2010, 2011, 2012, 2013, 2014 Kevin Ryde
Math-NumSeq is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
Math-NumSeq is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
You should have received a copy of the GNU General Public License along with
Math-NumSeq. If not, see <http://www.gnu.org/licenses/>.
=cut