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Full Discussion: awk - filtering data by if --> into an array
Homework and Emergencies Homework & Coursework Questions awk - filtering data by if --> into an array Post 302689507 by Corona688 on Tuesday 21st of August 2012 02:13:13 PM
Old 08-21-2012
Where do the 422, 231, 131 come from? They're not in your input data...

If I understand you correctly -- and I'm not sure I do, given that discrepancy -- you can use a trick to do what you want.

awk doesn't just let you read columns -- it lets you assign columns, too. The output separator is controlled by the OFS variable, and can be different from the input.

So you can do something like this:

Code:
awk -v OFS="\t" '{ ...
        $0="date and timestamp" # Set entire line to this value, overwriting $1 $2 ... variables too
        N=5 # Fifth column
        $N="value" # Set Nth colum to "value"
        print # print entire buffer
        }' file

to set the fifth, fourth, or whatever column to 'value' depending on which number N is set to. It will insert the right number of tabs in front as appropriate.
Last edited by Corona688; 08-21-2012 at 03:19 PM..
This User Gave Thanks to Corona688 For This Post:
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LEARN ABOUT MOJAVE

colrm

COLRM(1)						    BSD General Commands Manual 						  COLRM(1)

NAME

     colrm -- remove columns from a file

SYNOPSIS

     colrm [start [stop]]

DESCRIPTION

     The colrm utility removes selected columns from the lines of a file.  A column is defined as a single character in a line.  Input is read
     from the standard input.  Output is written to the standard output.

     If only the start column is specified, columns numbered less than the start column will be written.  If both start and stop columns are spec-
     ified, columns numbered less than the start column or greater than the stop column will be written.  Column numbering starts with one, not
     zero.

     Tab characters increment the column count to the next multiple of eight.  Backspace characters decrement the column count by one.

ENVIRONMENT

     The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of colrm as described in environ(7).

EXIT STATUS

     The colrm utility exits 0 on success, and >0 if an error occurs.

SEE ALSO

     awk(1), column(1), cut(1), paste(1)

HISTORY

     The colrm command appeared in 3.0BSD.

BSD
								  August 4, 2004							       BSD
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