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Bio::SeqIO::largefasta(3) User Contributed Perl Documentation Bio::SeqIO::largefasta(3)

Bio::SeqIO::largefasta - method i/o on very large fasta sequence files

Do not use this module directly. Use it via the Bio::SeqIO class.

This object can transform Bio::Seq objects to and from fasta flat file databases.

This module handles very large sequence files by using the Bio::Seq::LargePrimarySeq module to store all the sequence data in a file. This can be a problem if you have limited disk space on your computer because this will effectively cause 2 copies of the sequence file to reside on disk for the life of the Bio::Seq::LargePrimarySeq object. The default location for this is specified by the File::Spec->tmpdir routine which is usually /tmp on UNIX. If a sequence file is larger than the swap space (capacity of the /tmp dir) this could cause problems for the machine. It is possible to set the directory where the temporary file is located by adding the following line to your code BEFORE calling next_seq. See Bio::Seq::LargePrimarySeq for more information.

    $Bio::Seq::LargePrimarySeq::DEFAULT_TEMP_DIR = 'newdir';

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

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.

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:

  https://github.com/bioperl/bioperl-live/issues

Email: jason@bioperl.org

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

 Title   : next_seq
 Usage   : $seq = $stream->next_seq()
 Function: returns the next sequence in the stream
 Returns : A Bio::Seq::LargePrimarySeq object
 Args    : NONE

 Title   : write_seq
 Usage   : $stream->write_seq(@seq)
 Function: writes the $seq object into the stream
 Returns : 1 for success and 0 for error
 Args    : Bio::Seq object
2019-12-07 perl v5.32.1

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