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Top Forums Shell Programming and Scripting Insert missing field using perl,sed,awk Post 302586568 by vrclm on Monday 2nd of January 2012 12:28:39 PM
Old 01-02-2012
Insert missing field using perl,sed,awk

sample file (comma as field separators)

Code:
MessageFlow,1,BusIntBatchMgr,a
OOBEvent,1,BusIntBatchMgr,a
TaskEvents,1,,a
MTTrace,1,,a
MTWarning,,1,a
MessageFlow,1,Batch,a
OOBEvent,1,Batch,a
TaskEvents,1,,a
EAISAPIdocWizard,1,BusIntMgr,a
EAISAPBAPIWizard,1,BusIntMgr,a
EAISiebelWizard,1,BusIntMgr,a


In the above file, some lines have empty field3. The requirement is to fill the missing field3 with the previous field3 value.
i.e. In line 3,4&5, field3 should have the value BusIntBatchMgr. In line 8, field3 should have the value Batch.

Please let me know how to achieve this in PERL, SED or AWK (any combination). Please give me the code. Thanks in advance.

Last edited by Franklin52; 01-02-2012 at 04:03 PM.. Reason: Please use code tags for data and code samples, thank you
 

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ASNVAL(1)						     NCBI Tools User's Manual							 ASNVAL(1)

NAME
asnval - validate ASN.1 biological sequence records SYNOPSIS
asnval [-] [-A] [-B] [-C N] [-D] [-E str] [-F] [-G] [-J] [-K] [-L filename] [-M] [-N flags] [-P N] [-Q N] [-R N] [-S N] [-T] [-U] [-X] [-Y] [-Z] [-a type] [-b] [-c] [-d path] [-e] [-f str] [-i filename] [-k] [-l] [-o filename] [-p path] [-q] [-r] [-u] [-v N] [-x str] DESCRIPTION
asnval is a command-line tool to validate ASN.1-format biological sequence records. OPTIONS
A summary of options is included below. - Print usage message -A Validate Alignments -B Validate Barcodes -C N Max count -D Disable message suppression -E str Only Error Code to Show -F Test network access -G GI lookup from accession -J Require ISO-JTA? -K Summary to error file -L filename Log File -M Match locus_tag against General ID -N flags Latitude-longitude / country flags 0 none 1 test state/province 2 ignore water exception 3 both of the above -P N Highest severity for error to show: 0 none 1 informational 2 warning 3 error (default for -Q) 4 grounds for rejection (default for -P, -R) -Q N Lowest severity for error to show, per P -R N Severity for error in return code, per P -S N Skip count -T Use Threads -U Genome center submission -X Exon splice check -Y Check against old IDs -Z Remote CDS product fetch -a type Input ASN.1 type: a Automatic (default) c Catenated z Any e seq-Entry b Bioseq s bioseq-Set m seq-subMit t baTch bioseq-set u batch seq-sUbmit -b Batch file is Binary -c Batch file is Compressed -d path Path to Indexed Binary ASN.1 Data -e Ignore transcription/translation Exceptions -x str Substring filter -i filename Single input file (standard input by default) -k Local fetching -l Lock components in advance -o filename Single output file -p path Path to ASN.1 Files -q Taxonomy lookup -r Remote Fetching from ID -u Recurse -v N Verbosity: 1 Standard report (default) 2 Accession / severity / code (space delimited) 3 Accession / severity / code (tab delimited) 4 XML report 5 Accession / GI / severity / code (tab delimited) -x str File selection substring (.ent by default) AUTHOR
The National Center for Biotechnology Information. SEE ALSO
asndisc(1), cleanasn(1), sequin(1). NCBI
2012-06-24 ASNVAL(1)
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