AWK: row number NR

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# 1  
Old 08-28-2009
AWK: row number NR


I've file1 as:

after I read all rows with awk, I need to change some of them.
I mean, for example if the last row is zero then change row number 4 in zero too.
So I'd like to refers each row as a vector and change its value accordly some conditions. I know that NR keep just the "current" row value.
Is there a way to refers to a specific row ?


# 2  
Old 08-28-2009
awk '{arr[FNR]=$0}
       END { if (arr[4]=something) { arr[4]=somethingelse}
                for (i=1;i<FNR; i++){print arr[i]}' infile > outfile

FNR is NR for a given file; NR totals all records from all input files.
# 3  
Old 08-28-2009
Hi jim

thanks a lot for the fast answ. It works.
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