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problem with grep in combination with xargs

 
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Top Forums UNIX for Dummies Questions & Answers problem with grep in combination with xargs
# 15  
Old 12-23-2008
Hi Methyl,
file NY5876_cds.csv looks like this it hasn't got the > symbol in front of each line
NY5876_1 chromosomal replication initiation protein
NY5876_2 DNA polymerase III subunit beta
NY5876_3 recombination protein F
NY5876_4 DNA gyrase subunit B
NY5876_5 type I restriction-modification system, M subunit, putative
NY5876_6 type I restriction-modification system S subunit
NY5876_7 hypothetical protein PSPTO_0007
NY5876_8 HsdR family type I site-specific deoxyribonuclease
NY5876_9 ISPsy3, transposase
NY5876_10 hypothetical protein PSPTO_0011
....
NY5876_9999 hypothetical protein
# 16  
Old 01-08-2009
Bruno, now we know that the fields are separated by a single tab not a space we need to take that into account. If we generate the TAB character it makes it clear what we are doing.

Code:
By the way, one quick way of making tabs visible in a text file is:
sed -n l myfilename

(
#!/bin/ksh
TAB=`echo "\0011"`    # TAB Character
cat file_2|while read TAG
do
        grep \^"${TAG}${TAB}" file_1
done
) > test_file

 
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