Bio::Seq::LargeSeq(3)

NAME
Bio::Seq::LargeSeq - SeqI compliant object that stores sequence as files in /tmp

SYNOPSIS
  # normal primary seq usage

DESCRIPTION
This object stores a sequence as a series of files in a temporary directory. The aim is to allow someone the ability to store very large sequences (eg, > 100MBases) in a file system without running out of memory (eg, on a 64 MB real memory machine!).

Of course, to actually make use of this functionality, the programs which use this object must not call $primary_seq->seq otherwise the entire sequence will come out into memory and probably paste your machine. However, calls $primary_seq->subseq(10,100) will cause only 90 characters to be brought into real memory.

FEEDBACK

  Mailing Lists
User feedback is an integral part of the evolution of this and other Bioperl modules. Send your comments and suggestions preferably to one of the Bioperl mailing lists. Your participation is much appreciated.

  bioperl-l@bioperl.org                  - General discussion
  http://bioperl.org/wiki/Mailing_lists  - About the mailing lists

  Support
Please direct usage questions or support issues to the mailing list:

bioperl-l@bioperl.org

rather than to the module maintainer directly. Many experienced and reponsive experts will be able look at the problem and quickly address it. Please include a thorough description of the problem with code and data examples if at all possible.

  Reporting Bugs
Report bugs to the Bioperl bug tracking system to help us keep track the bugs and their resolution. Bug reports can be submitted via the web:

  http://bugzilla.open-bio.org/

AUTHOR - Ewan Birney
Email birney@ebi.ac.uk

APPENDIX
The rest of the documentation details each of the object methods. Internal methods are usually preceded with a _

  trunc
 Title   : trunc
 Usage   : $subseq = $myseq->trunc(10,100);
 Function: Provides a truncation of a sequence,

 Example :
 Returns : a fresh Bio::SeqI object
 Args    :

  Bio::Seq::LargePrimarySeq methods

  add_sequence_as_string
 Title   : add_sequence_as_string
 Usage   : $seq->add_sequence_as_string("CATGAT");
 Function: Appends additional residues to an existing LargePrimarySeq object.
           This allows one to build up a large sequence without storing
           entire object in memory.
 Returns : Current length of sequence
 Args    : string to append