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Top Forums Shell Programming and Scripting Lookup value of file1 in file2 using a key Post 303010579 by cmccabe on Wednesday 3rd of January 2018 03:01:23 PM
Old 01-03-2018
Lookup value of file1 in file2 using a key

Trying to use awk to match each line in file1 with line in file2 using $1 and $2 and print. File2 is tab-delimeted as is the output and if there is no match then it is skipped. The awk below executes but the output is empty. I think file1 is being split on the : and being saved in array c which looked-up in $1 and $2 of file2. Thank you Smilie.

file1 single column
Code:
chr12:25380271
chr12:25387855

file2 tab-delimeted
Code:
chr12	25380271	COSM27159	C	T	KRAS	NM_033360.3	exonic	c.187G>A	p.Glu63Lys
chr12	25380275	COSM555	T	A	KRAS	NM_033360.3	exonic	c.183A>T	p.Gln61His
chr12	25380275	COSM554	T	G	KRAS	NM_033360.3	exonic	c.183A>C	p.Gln61His

awk
Code:
awk -F':' 'NR==FNR{c[$1$2]++;next};c[$1$2] > 0' file1 file2


desired output
Code:
chr12	25380271	COSM27159	C	T	KRAS	NM_033360.3	exonic	c.187G>A	p.Glu63Lys

 

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JOIN(1) 						      General Commands Manual							   JOIN(1)

NAME
join - relational database operator SYNOPSIS
join [ options ] file1 file2 DESCRIPTION
Join forms, on the standard output, a join of the two relations specified by the lines of file1 and file2. If file1 is `-', the standard input is used. File1 and file2 must be sorted in increasing ASCII collating sequence on the fields on which they are to be joined, normally the first in each line. There is one line in the output for each pair of lines in file1 and file2 that have identical join fields. The output line normally con- sists of the common field, then the rest of the line from file1, then the rest of the line from file2. Fields are normally separated by blank, tab or newline. In this case, multiple separators count as one, and leading separators are dis- carded. These options are recognized: -an In addition to the normal output, produce a line for each unpairable line in file n, where n is 1 or 2. -e s Replace empty output fields by string s. -jn m Join on the mth field of file n. If n is missing, use the mth field in each file. -o list Each output line comprises the fields specifed in list, each element of which has the form n.m, where n is a file number and m is a field number. -tc Use character c as a separator (tab character). Every appearance of c in a line is significant. SEE ALSO
sort(1), comm(1), awk(1) BUGS
With default field separation, the collating sequence is that of sort -b; with -t, the sequence is that of a plain sort. The conventions of join, sort, comm, uniq, look and awk(1) are wildly incongruous. JOIN(1)
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