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Bio::DB::Bam::Pileup

Object passed to pileup() callback

See "The generic fetch() and pileup() methods" in Bio::DB::Sam for how this object is passed to pileup callbacks.

A Bio::DB::Bam::Pileup object (or a Bio::DB::Bam::PileupWrapper object) is passed to the callback passed to the Bio::DB::Sam->pileup() method for each column in a sequence alignment. The only difference between the two is that the latter returns the more convenient Bio::DB::Bam::AlignWrapper objects in response to the alignment() method, at the cost of some performance loss.

$alignment = $pileup->alignment
Return the Bio::DB::Bam::Alignment or Bio::DB::Bam::AlignWrapper object representing the aligned read.
$alignment = $pileup->b
This method is an alias for alignment(). It is available for compatibility with the C API.
$qpos = $pileup->qpos
Return the position of this aligned column in read coordinates, using zero-based coordinates.
$pos = $pileup->pos
Return the position of this aligned column in read coordinates, using 1-based coordinates.
$indel = $pileup->indel
If this column is an indel, return a positive integer for an insertion relative to the reference, a negative integer for a deletion relative to the reference, or 0 for no indel at this column.
$is_del = $pileup->is_del
True if the base on the padded read is a deletion.
$level = $pileup->level
If pileup() or fast_pileup() was invoked with the "keep_level" flag, then this method will return a positive integer indicating the level of the read in a printed multiple alignment.
$pileup->is_head
$pileup->is_tail
These fields are defined in bam.h but their interpretation is obscure.

Bio::Perl, Bio::DB::Sam, Bio::DB::Bam::Alignment, Bio::DB::Bam::Constants

Lincoln Stein <lincoln.stein@oicr.on.ca>. <lincoln.stein@bmail.com>

Copyright (c) 2009 Ontario Institute for Cancer Research.

This package and its accompanying libraries is free software; you can redistribute it and/or modify it under the terms of the GPL (either version 1, or at your option, any later version) or the Artistic License 2.0. Refer to LICENSE for the full license text. In addition, please see DISCLAIMER.txt for disclaimers of warranty.