Bio::Tools::Run::Newbler(3pm) | User Contributed Perl Documentation | Bio::Tools::Run::Newbler(3pm) |
Bio::Tools::Run::Newbler - Wrapper for local execution of Newbler
use Bio::Tools::Run::Newbler; # Run Minmo using an input FASTA file my $factory = Bio::Tools::Run::Newbler->new( -minimum_overlap_length => 35 ); my $asm_obj = $factory->run($fasta_file, $qual_file); # An assembly object is returned by default for my $contig ($assembly->all_contigs) { ... do something ... } # Read some sequences use Bio::SeqIO; my $sio = Bio::SeqIO->new(-file => $fasta_file, -format => 'fasta'); my @seqs; while (my $seq = $sio->next_seq()) { push @seqs,$seq; } # Run Newbler using input sequence objects and returning an assembly file my $asm_file = 'results.ace'; $factory->out_type($asm_file); $factory->run(\@seqs);
Wrapper module for the local execution of the proprietary DNA assembly program GS De Novo Assembler (Newbler) from Roche/454 v2.0.00.20: http://www.454.com/products-solutions/analysis-tools/gs-de-novo-assembler.asp
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The rest of the documentation details each of the object methods. Internal methods are usually preceded with a _
Title : new Usage : $assembler->new( -min_len => 50, -min_ident => 95 ); Function: Creates a Newbler factory Returns : A Bio::Tools::Run::Newbler object Args : Newbler options available in this module (from the Newbler manual): large Shortcut some of the computationally expensive algorithms to save some time. Useful for large or complex datasets (default: off). ace_raw Output the full "raw" read sequence (default: off). ace_trimmed Output only the "trimmed" sequences (after low quality, vector and key trimming) (default: on). expected_depth Expected depth of the assembly. Filters out random-chance level events at bigger depths. 0 means to not use the expected depth information (default: 0). mid_conf_file MID configuration file for decoding the multiplex data. no_trim Disable the quality and primer trimming of the input sequences (default: off). vector_trim Specify a vector trimming database (in FASTA format) to trim the ends of input sequences. vector_screen Specify a vector screening database (in FASTA format) to remove contaminants, i.e. input reads that align against a sequence in the database. aln_identity_score Set the alignment identity score. When multiple alignments are found, it is the per-overlap column identity score used to sort the overlaps for use in the progressive alignment (default: 2). aln_difference_score Set the alignment difference score. For multiple alignments this is the per-overlap difference score used to sort the overlaps for use in the progressive multi-alignment (default: -3). in_memory Keep all sequence data in memory throughout the computation. Can speed up the computation but requires more computer memory (default: off). min_ovl_identity / minimum_overlap_similarity Minimum overlap identity, i.e. the minimum percent identity of overlaps used by the assembler (default: 40). min_ovl_length / minimum_overlap_length Minimum overlap length, i.e. the minimum length of overlaps considered by the assembler (default: 90). Warning: It seems like this parameter is not respected by the program in the current version no_auto_rescore Do not use the quality score re-scoring algorithm (default: off). seed_count Set the seed count parameter, the number of seeds required in a window before an extension is made (default: 1). seed_length Set the seed length parameter, i.e. the number of bases between seed generation locations used in the exact k-mer matching part of the overlap detection (between 6 16) (default: 16). seed_step Set the seed step parameter, i.e. the number of bases used for each seed in the exact k-mer matching part of the overlap detection (i.e. the "k" value) (default: 12). no_duplicates Treat each read as a separate read and do not group them into duplicates for assembly or consensus calling (default: off).
Title : _check_sequence_input Usage : $assembler->_check_sequence_input($seqs) Function: Check that the sequence input is arrayref of sequence objects or a FASTA file, or a MIDinfo + dir, or a MIDinfo + file. If not, an error is thrown. Returns : 1 if the check passed Args : sequence input
Title : out_type Usage : $factory->out_type('Bio::Assembly::ScaffoldI') Function: Get/set the desired type of output Returns : The type of results to return Args : Desired type of results to return (optional): 'Bio::Assembly::IO' object 'Bio::Assembly::ScaffoldI' object (default) The name of a file to save the results in
Title : run Usage : $factory->run($fasta_file); Function: Run TIGR Assembler Returns : - a Bio::Assembly::ScaffoldI object, a Bio::Assembly::IO object, a filename, or undef if all sequences were too small to be usable Returns : Assembly results (file, IO object or assembly object) Args : Sequence input can be: * a sequence object arrayref * a FASTA file * a SFF file and optional MID information. Example: mid2@/home/xxx/myreads.sff * the path to an run analysis directory and MID information The reads must be between 50 and 2000 bp. Newbler does not support for input quality files. See the Newbler manual for details.
Title : _run Usage : $factory->_run() Function: Make a system call and run TIGR Assembler Returns : An assembly file Args : - FASTA file, SFF file and MID, or analysis dir and MID - optional QUAL file
2018-09-14 | perl v5.26.2 |