Provided by: libbio-perl-perl_1.7.2-2_all 
NAME
Bio::Map::Position - A single position of a Marker, or the range over which
that marker lies, in a Map
SYNOPSIS
use Bio::Map::Position;
my $position = Bio::Map::Position->new(-map => $map,
-element => $marker,
-value => 100
);
my $position_with_range = Bio::Map::Position->new(-map => $map,
-element => $marker,
-start => 100,
-length => 10
);
DESCRIPTION
This object is an implementation of the PositionI interface that handles the specific
values of a position. This allows a map element (e.g. Marker) to have multiple positions
within a map and still be treated as a single entity.
This handles the concept of a relative map in which the order of elements and the distance
between them is known, but does not directly handle the case when distances are unknown -
in that case arbitrary values must be assigned for position values.
No units are assumed here - units are handled by context of which Map a position is placed
in or the subclass of this Position.
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 list. 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 of the bugs and their
resolution. Bug reports can be submitted via the web:
https://github.com/bioperl/bioperl-live/issues
AUTHOR - Jason Stajich
Email jason@bioperl.org
CONTRIBUTORS
Lincoln Stein, lstein@cshl.org Heikki Lehvaslaiho, heikki-at-bioperl-dot-org Chad
Matsalla, bioinformatics1@dieselwurks.com Sendu Bala, bix@sendu.me.uk
APPENDIX
The rest of the documentation details each of the object methods. Internal methods are
usually preceded with a _
new
Title : new
Usage : my $obj = Bio::Map::Position->new();
Function: Builds a new Bio::Map::Position object
Returns : Bio::Map::Position
Args : -map => Bio::Map::MapI object
-element => Bio::Map::MappableI object
-relative => Bio::Map::RelativeI object
* If this position has no range, or if a single value can describe
the range *
-value => scalar : something that describes the single
point position or range of this
Position, most likely an int
* Or if this position has a range, at least two of *
-start => int : value of the start co-ordinate
-end => int : value of the end co-ordinate
-length => int : length of the range
relative
Title : relative
Usage : my $relative = $position->relative();
$position->relative($relative);
Function: Get/set the thing this Position's coordinates (numerical(), start(),
end()) are relative to, as described by a Relative object.
Returns : Bio::Map::RelativeI (default is one describing "relative to the
start of the Position's map")
Args : none to get, OR
Bio::Map::RelativeI to set
absolute
Title : absolute
Usage : my $absolute = $position->absolute();
$position->absolute($absolute);
Function: Get/set how this Position's co-ordinates (numerical(), start(),
end()) are reported. When absolute is off, co-ordinates are
relative to the thing described by relative(). Ie. the value
returned by start() will be the same as the value you set start()
to. When absolute is on, co-ordinates are converted to be relative
to the start of the map.
So if relative() currently points to a Relative object describing
"relative to another position which is 100 bp from the start of
the map", this Position's start() had been set to 50 and absolute()
returns 1, $position->start() will return 150. If absolute() returns
0 in the same situation, $position->start() would return 50.
Returns : boolean (default 0)
Args : none to get, OR
boolean to set
value
Title : value
Usage : my $pos = $position->value;
Function: Get/Set the value for this position
Returns : scalar, value
Args : [optional] new value to set
numeric
Title : numeric
Usage : my $num = $position->numeric;
Function: Read-only method that is guaranteed to return a numeric
representation of the start of this position.
Returns : scalar numeric
Args : none to get the co-ordinate normally (see absolute() method), OR
Bio::Map::RelativeI to get the co-ordinate converted to be
relative to what this Relative describes.
start
Title : start
Usage : my $start = $position->start();
$position->start($start);
Function: Get/set the start co-ordinate of this position.
Returns : the start of this position
Args : scalar numeric to set, OR
none to get the co-ordinate normally (see absolute() method), OR
Bio::Map::RelativeI to get the co-ordinate converted to be
relative to what this Relative describes.
end
Title : end
Usage : my $end = $position->end();
$position->end($end);
Function: Get/set the end co-ordinate of this position.
Returns : the end of this position
Args : scalar numeric to set, OR
none to get the co-ordinate normally (see absolute() method), OR
Bio::Map::RelativeI to get the co-ordinate converted to be
relative to what this Relative describes.
length
Title : length
Usage : $length = $position->length();
Function: Get/set the length of this position's range, changing the end() if
necessary. Getting and even setting the length will fail if both
start() and end() are not already defined.
Returns : the length of this range
Args : none to get, OR scalar numeric (>0) to set.
sortable
Title : sortable
Usage : my $num = $position->sortable();
Function: Read-only method that is guaranteed to return a value suitable
for correctly sorting this kind of position amongst other positions
of the same kind on the same map. Note that sorting different kinds
of position together is unlikely to give sane results.
Returns : numeric
Args : none
toString
Title : toString
Usage : print $position->toString(), "\n";
Function: stringifies this range
Returns : a string representation of the range of this Position
Args : optional Bio::Map::RelativeI to have the co-ordinates reported
relative to the thing described by that Relative
absolute_relative
Title : absolute_relative
Usage : my $rel = $position->absolute_relative();
Function: Get a relative describing the start of the map. This is useful for
supplying to the coordinate methods (start(), end() etc.) to get
the temporary effect of having set absolute(1).
Returns : Bio::Map::Relative
Args : none