TFBS::MatrixSet(3)

NAME
TFBS::Matrix::Set - an agregate class representing a set of matrix patterns, containing methods for manipulating the set as a whole

SYNOPSIS
    # creation of a TFBS::MatrixSet object
    # let @list_of_matrix_objects be a list of TFBS::Matrix::* objects

    ###################################
    # Create a TFBS::MatrixSet object:

    my $matrixset = TFBS::MatrixSet->new(); # creates an empty set
    $matrixset->add_Matrix(@list_of_matrix_objects); #add matrix objects to set
    $matrixset->add_Matrix($matrixobj); # adds a single matrix object to set

    # or, same as above:

    my $matrixset = TFBS::MatrixSet->new(@list_of_matrix_objects, $matrixobj);

    ###################################
    #

DESCRIPTION
TFBS::MatrixSet is an aggregate class storing a set of TFBS::Matrix::* subclass objects, and providing methods form manipulating those sets as a whole. TFBS::MatrixSet objects are created <I>de novo<I> or returned by some database (TFBS::DB::*) retrieval methods.

FEEDBACK
Please send bug reports and other comments to the author.

AUTHOR - Boris Lenhard
Boris Lenhard <Boris.Lenhard@cgb.ki.se>

APPENDIX
The rest of the documentation details each of the object methods. Internal methods are preceded with an underscore.

  new

  add_matrix
 Title   : add_matrix
 Usage   : $matrixset->add_matrix(@list_of_matrix_objects);
 Function: Adds matrix objects to matrixset
 Returns : object reference (usually ignored)
 Args    : one or more TFBS::Matrix::* objects

  add_matrix_set
 Title   : add_matrix
 Usage   : $matrixset->add_matrix(@list_of_matrixset_objects);
 Function: Adds to the matrixset matrix objects contained in one or
           more other matrixsets
 Returns : object reference (usually ignored)
 Args    : one or more TFBS::MatrixSet objects

  search_seq
 Title   : search_seq
 Usage   : my $siteset = $matrixset->search_seq(%args)
 Function: scans a nucleotide sequence with all patterns represented
           stored in $matrixset;

           It works only if all matrix objects in $matrixset understand
           search_seq method (currently only TFBS::Matrix::PWM objects do)
 Returns : a TFBS::SiteSet object
 Args    : # you must specify either one of the following three:

           -file,       # the name od a fasta file (single sequence)
              #or
           -seqobj      # a Bio::Seq object
                        # (more accurately, a Bio::PrimarySeqobject or a
                        #  subclass thereof)
              #or
           -seqstring # a string containing the sequence

           -threshold,  # minimum score for the hit, either absolute
                        # (e.g. 11.2) or relative (e.g. "75%")
                        # OPTIONAL: default "80%"

  search_aln
 Title   : search_aln
 Usage   : my $site_pair_set = $matrixset->search_aln(%args)
 Function: Scans a pairwise alignment of nucleotide sequences
           with the pattern represented by the PWM: it reports only
           those hits that are present in equivalent positions of both
           sequences and exceed a specified threshold score in both, AND
           are found in regions of the alignment above the specified
           conservation cutoff value.
           It works only if all matrix object in $matrixset understand
           search_aln method (currently only TFBS::Matrix::PWM objects do)

 Returns : a TFBS::SitePairSet object
 Args    : # you must specify either one of the following three:

           -file,       # the name of the alignment file in Clustal
                               format
              #or
           -alignobj      # a Bio::SimpleAlign object
                        # (more accurately, a Bio::PrimarySeqobject or a
                        #  subclass thereof)
              #or
           -alignstring # a multi-line string containing the alignment
                        # in clustal format
           #############

           -threshold,  # minimum score for the hit, either absolute
                        # (e.g. 11.2) or relative (e.g. "75%")
                        # OPTIONAL: default "80%"

           -window,     # size of the sliding window (inn nucleotides)
                        # for calculating local conservation in the
                        # alignment
                        # OPTIONAL: default 50

           -cutoff      # conservation cutoff (%) for including the
                        # region in the results of the pattern search
                        # OPTIONAL: default "70%"

           -subpart     # subpart of the alignment to search, given as e.g.
                        # -subpart => { relative_to => 1,
                        #               start       => 140,
                        #               end         => 180 }
                        # where start and end are coordinates in the
                        # sequence indicated by relative_to (1 for the
                        # 1st sequence in the alignment, 2 for the 2nd)
                        # OPTIONAL: by default searches entire alignment

           -conservation
                        # conservation profile, a TFBS::ConservationProfile
                        # OPTIONAL: by default the conservation profile is
                        # computed internally on the fly (less efficient)

  size
 Title   : size
 Usage   : my $number_of_matrices = $matrixset->size;
 Function: gets the number of matrix objects in the $matrixset
           (i.e. the size of the set)
 Returns : a number
 Args    : none

  Iterator
 Title   : Iterator
 Usage   : my $matrixset_iterator =
                   $matrixset->Iterator(-sort_by =>'total_ic');
           while (my $matrix_object = $matrix_iterator->next) {
               # do whatever you want with individual matrix objects
           }
 Function: Returns an iterator object that can be used to go through
           all members of the set
 Returns : an iterator object (currently undocumentened in TFBS -
                               but understands the 'next' method)
 Args    : -sort_by # optional - currently it accepts
                    #    'ID' (alphabetically)
                    #    'name' (alphabetically)
                    #    'class' (alphabetically)
                    #    'total_ic' (numerically, decreasing order)

           -reverse # optional - reverses the default sorting order if true