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Full Discussion: Foreach loop to run a perl script on multiple files
Top Forums UNIX for Dummies Questions & Answers Foreach loop to run a perl script on multiple files Post 302341304 by greptastic on Wednesday 5th of August 2009 12:43:05 PM
Old 08-05-2009
Foreach loop to run a perl script on multiple files
Hi,

I have thousands of files in a directory that have the following 2 formats:

289620178.aln
289620179.aln
289620180.aln
289620183.aln
289620184.aln
289620185.aln
289620186.aln
289620187.aln
289620188.aln
289620189.aln
289620190.aln
289620192.aln....

and:

alnCDS_1.fasta
alnCDS_2.fasta
alnCDS_3.fasta
alnCDS_4.fasta
alnCDS_5.fasta
alnCDS_6.fasta
alnCDS_7.fasta
alnCDS_8.fasta
alnCDS_9.fasta
alnCDS_10.fasta....



I am using the following foreach statement to run a perl script like so:

foreach file1 ( *.aln ) ; foreach file2 ( *.fasta )
foreach? ./perl.script.pl $file1 $file2 > $file1$file2.out
foreach? end

This gives me output files

289620178.alnalnCDS_1.fasta.out
289620178.alnalnCDS_2.fasta.out
289620178.alnalnCDS_3.fasta.out .....

when what I want is the following:

289620178.alnalnCDS_1.fasta.out
289620179.alnalnCDS_2.fasta.out
289620180.alnalnCDS_3.fasta.out.... etc...

so that each of the files (*.aln and *.fasta) are sequentially paired as input into the perl script without all of the possible pairs being run through.

Is there a way to do this ?

Thanks!!
 

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LEARN ABOUT DEBIAN

pynast

VERSION:(1)							   User Commands						       VERSION:(1)

NAME

       PyNAST - alignment of short DNA sequences

SYNOPSIS

       pynast [options] {-i input_fp -t template_fp}

DESCRIPTION

       [] indicates optional input (order unimportant) {} indicates required input (order unimportant)

   Example usage:
	      pynast -i my_input.fasta -t my_template.fasta

OPTIONS

       --version
	      show program's version number and exit

       -h, --help
	      show this help message and exit

       -t TEMPLATE_FP, --template_fp=TEMPLATE_FP
	      path to template alignment file [REQUIRED]

       -i INPUT_FP, --input_fp=INPUT_FP
	      path to input fasta file [REQUIRED]

       -v, --verbose
	      Print status and other information during execution [default: False]

       -p MIN_PCT_ID, --min_pct_id=MIN_PCT_ID
	      minimum percent sequence	identity to consider a sequence a match [default: 75.0]

       -l MIN_LEN, --min_len=MIN_LEN
	      minimum sequence length to include in NAST alignment [default: 1000]

       -m PAIRWISE_ALIGNMENT_METHOD, --pairwise_alignment_method=PAIRWISE_ALIGNMENT_METHOD
	      method for performing pairwise alignment [default: uclust]

       -a FASTA_OUT_FP, --fasta_out_fp=FASTA_OUT_FP
	      path to store resulting alignment file [default: derived from input filepath]

       -g LOG_FP, --log_fp=LOG_FP
	      path to store log file [default: derived from input filepath]

       -f FAILURE_FP, --failure_fp=FAILURE_FP
	      path to store file of seqs which fail to align [default: derived from input filepath]

       -e MAX_E_VALUE, --max_e_value=MAX_E_VALUE
	      Depreciated. Will be removed in PyNAST 1.2

       -d BLAST_DB, --blast_db=BLAST_DB
	      Depreciated. Will be removed in PyNAST 1.2

SEE ALSO

       http://pynast.sourceforge.net

Version: pynast 1.1						    August 2011 						       VERSION:(1)
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