Help on bash

Hi,

I have this simple awk script that cross-match 2 tables/files using for example their 3th columns

awk '{v=FNR==1?"\n":$3} NR==FNR
{a[v]=$3; b[v]=$0; next}
v in a {print b[v],$0}' fileName1 fileName2


I would like to put this function into .bashrc

function awkcrossmatch() {
tmp=$1
awk '{v=FNR==1?"\n":$tmp} NR==FNR
{a[v]=$tmp; b[v]=$0; next}
v in a {print b[v],$0}' $2 $3
}

Why this calling sequence doesnot work?

awkcrossmatch '$3' fileName1 fileName2


How to write this properly?


Thanks
oliver

The awk string is in single quotes, so $tmp will not get replaced with the value you want. You would have to either use double quotes and escape the awk $ characters with backslashes, or build the string up by concatenating strings together.

I hope I understood correctly. I did this change

function awkcrossmatch() {
tmp=$1
awk "{v=FNR==1?"\n":\$tmp} NR==FNR
{a[v]=\$tmp; b[v]=\$0; next}
v in a {print b[v],\$0}" $2 $3
}


But steel it does not work.

Bash? As in Linux Bash? You might want to move over to the linux forums