Bio::Coordinate::Chain.3pm

Langue: en

Version: 2010-05-19 (ubuntu - 24/10/10)

Section: 3 (Bibliothèques de fonctions)

NAME

Bio::Coordinate::Chain - Mapping locations through a chain of coordinate mappers

SYNOPSIS

   # create Bio::Coordinate::Pairs, or any MapperIs, somehow
   $pair1; $pair2;
 
   # add them into a Chain
   $collection = Bio::Coordinate::Chain->new;
   $collection->add_mapper($pair1);
   $collection->add_mapper($pair2);
 
   # create a position and map it
   $pos = Bio::Location::Simple->new (-start => 5, -end => 9 );
   $match = $collection->map($pos);
   if ($match) {
       sprintf "Matches at %d-%d\n", $match->start, $match->end,
   } else {
       print "No match\n";
   }
 
 

DESCRIPTION

This class assumes that you have built several mappers and want to link them together so that output from the previous mapper is the next mappers input. This way you can build arbitrarily complex mappers from simpler components.

Note that Chain does not do any sanity checking on its mappers. You are solely responsible that input and output coordinate systems, direction of mapping and parameters internal to mappers make sense when chained together.

To put it bluntly, the present class is just a glorified foreach loop over an array of mappers calling the map method.

It would be neat to an internal function that would generate a new single step mapper from those included in the chain. It should speed things up considerably. Any volunteers?

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 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 - Heikki Lehvaslaiho

Email: heikki-at-bioperl-dot-org

CONTRIBUTORS

Ewan Birney, birney@ebi.ac.uk

APPENDIX

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

map

  Title   : map
  Usage   : $newpos = $obj->map($pos);
  Function: Map the location through all the mappers in the chain.
  Example :
  Returns : new Location in the output coordiante system
  Args    : a Bio::Location::Simple object
 
 

Inherited methods

add_mapper

  Title   : add_mapper
  Usage   : $obj->add_mapper($mapper)
  Function: Pushes one Bio::Coodinate::MapperI into the list of mappers.
            Sets _is_sorted() to false.
  Example : 
  Returns : 1 when succeeds, 0 for failure.
  Args    : mapper object
 
 

mappers

  Title   : mappers
  Usage   : $obj->mappers();
  Function: Returns or sets a list of mappers.
  Example : 
  Returns : array of mappers
  Args    : array of mappers
 
 

each_mapper

  Title   : each_mapper
  Usage   : $obj->each_mapper();
  Function: Returns a list of mappers.
  Example : 
  Returns : array of mappers
  Args    : none
 
 

swap

  Title   : swap
  Usage   : $obj->swap;
  Function: Swap the direction of mapping;input <-> output
  Example :
  Returns : 1
  Args    :
 
 

test

  Title   : test
  Usage   : $obj->test;
  Function: test that both components of all pairs are of the same length.
            Ran automatically.
  Example :
  Returns : boolean
  Args    :