Ewan Birney


Bio::Search::Hit::GenericHit - A generic implementation of the Bio::Search::Hit::HitI interface


    use Bio::Search::Hit::GenericHit;
    my $hit = new Bio::Search::Hit::GenericHit(-algorithm => 'blastp');



This object handles the hit data from a Database Sequence Search such as FASTA or BLAST.


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AUTHOR - Jason Stajich and Steve Chervitz

Email jason@bioperl.org Email sac@bioperl.org


Additional contributors names and emails here


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


 Title   : new
 Usage   : my $obj = new Bio::Search::Hit::GenericHit();
 Function: Builds a new Bio::Search::Hit::GenericHit object 
 Returns : Bio::Search::Hit::GenericHit
 Args    : -name         => Name of Hit (required)
           -description  => Description (optional)
           -accession    => Accession number (optional)
           -length       => Length of the Hit (optional)
           -score        => Raw Score for the Hit (optional)
           -significance => Significance value for the Hit (optional)
           -algorithm    => Algorithm used (BLASTP, FASTX, etc...)
           -hsps         => Array ref of HSPs for this Hit. 


 Title   : add_hsp
 Usage   : $hit->add_hsp($hsp)
 Function: Add a HSP to the collection of HSPs for a Hit
 Returns : number of HSPs in the Hit
 Args    : Bio::Search::HSP::HSPI object

Bio::Search::Hit::HitI methods

Implementation of Bio::Search::Hit::HitI methods


 Title   : name
 Usage   : $hit_name = $hit->name();
 Function: returns the name of the Hit sequence
 Returns : a scalar string
 Args    : [optional] scalar string to set the name


 Title   : accession
 Usage   : $acc = $hit->accession();
 Function: Retrieve the accession (if available) for the hit
 Returns : a scalar string (empty string if not set)
 Args    : none


 Title   : description
 Usage   : $desc = $hit->description();
 Function: Retrieve the description for the hit
 Returns : a scalar string
 Args    : [optional] scalar string to set the descrition


 Title   : length
 Usage   : my $len = $hit->length
 Function: Returns the length of the hit 
 Returns : integer
 Args    : [optional] integer to set the length


 Title   : algorithm
 Usage   : $alg = $hit->algorithm();
 Function: Gets the algorithm specification that was used to obtain the hit
           For BLAST, the algorithm denotes what type of sequence was aligned 
           against what (BLASTN: dna-dna, BLASTP prt-prt, BLASTX translated 
           dna-prt, TBLASTN prt-translated dna, TBLASTX translated 
           dna-translated dna).
 Returns : a scalar string 
 Args    : [optional] scalar string to set the algorithm


 Title   : raw_score
 Usage   : $score = $hit->raw_score();
 Function: Gets the "raw score" generated by the algorithm.  What
           this score is exactly will vary from algorithm to algorithm,
           returning undef if unavailable.
 Returns : a scalar value
 Args    : [optional] scalar value to set the raw score


 Title   : significance
 Usage   : $significance = $hit->significance();
 Function: Used to obtain the E or P value of a hit, i.e. the probability that
           this particular hit was obtained purely by random chance.  If
           information is not available (nor calculatable from other
           information sources), return undef.
 Returns : a scalar value or undef if unavailable
 Args    : [optional] scalar value to set the significance


 Title    : next_hsp
 Usage    : while( $hsp = $obj->next_hsp()) { ... }
 Function : Returns the next available High Scoring Pair
 Example  : 
 Returns  : Bio::Search::HSP::HSPI object or null if finished
 Args     : none


 Title   : rewind
 Usage   : $hit->rewind;
 Function: Allow one to reset the HSP iteration to the beginning
           Since this is an in-memory implementation
 Returns : none
 Args    : none


 Usage     : $hit_object->hsps();
 Purpose   : Get a list containing all HSP objects.
           : Get the numbers of HSPs for the current hit.
 Example   : @hsps = $hit_object->hsps();
           : $num  = $hit_object->hsps();  # alternatively, use num_hsps()
 Returns   : Array context : list of Bio::Search::HSP::BlastHSP.pm objects.
           : Scalar context: integer (number of HSPs).
           :                 (Equivalent to num_hsps()).
 Argument  : n/a. Relies on wantarray
 Throws    : Exception if the HSPs have not been collected.

See Also : hsp(), num_hsps()