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Top Forums Shell Programming and Scripting Need to parse file "x" lines at a time ... awk array? Post 302390329 by STN on Wednesday 27th of January 2010 03:00:00 PM
Old 01-27-2010
Quote:
Originally Posted by Franklin52
If the order of the lines are the same:
Code:
awk -F, '{printf("%s%s", $4, NR%3?FS:"\n")}' file

That kicked out a syntax error on me. Could be the version of awk I have (Sol10).

Quote:
Originally Posted by Scrutinizer
Try this:
Code:
awk -F, '{if($2==p)d=d","$4;else{print d;d=$4;p=$2}}END{print d}' infile

That worked like a charm! If I interpret this a bit you did not imply anything regarding 53 lines, but instead told it to read all the lines while $2 is constant. Once $2 changes then dump line and start over. Correct?
 

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GREP(1) 						      General Commands Manual							   GREP(1)

NAME
grep - search a file for lines containing a given pattern SYNOPSIS
grep [-elnsv] pattern [file] ... OPTIONS
-e -e pattern is the same as pattern -c Print a count of lines matched -i Ignore case -l Print file names, no lines -n Print line numbers -s Status only, no printed output -v Select lines that do not match EXAMPLES
grep mouse file # Find lines in file containing mouse grep [0-9] file # Print lines containing a digit DESCRIPTION
Grep searches one or more files (by default, stdin) and selects out all the lines that match the pattern. All the regular expressions accepted by ed and mined are allowed. In addition, + can be used instead of * to mean 1 or more occurrences, ? can be used to mean 0 or 1 occurrences, and | can be used between two regular expressions to mean either one of them. Parentheses can be used for grouping. If a match is found, exit status 0 is returned. If no match is found, exit status 1 is returned. If an error is detected, exit status 2 is returned. SEE ALSO
cgrep(1), fgrep(1), sed(1), awk(9). GREP(1)
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