The meaning of %s in printf Post: 302419193

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Top Forums UNIX for Dummies Questions & Answers The meaning of %s in printf Post 302419193 by cosmologist on Thursday 6th of May 2010 12:35:34 PM

05-06-2010

Registered User

The meaning of %s in printf

I have this command like that has %s in it, I know %s calls a column, but I am not sure I understand which column (I mean for my case I can check the input file, but I want to know how is this %s used, how comes tha same symbo; gives different columns in one command line:

Code:

{printf "grep %s junk.all.dat | awk '$4<=%s{print $1, $2, $3, $4, $5}' | wc -l >> fitnumb.dat\n"}

Each %s give a different column in the output:

Code:

grep 3a junk.all.dat | awk '$4<=157.951{print $1, $2, $3, $4, $5}' | wc -l >> fitnumb.dat
grep 7a junk.all.dat | awk '$4<=118.793{print $1, $2, $3, $4, $5}' | wc -l >> fitnumb.dat
grep 9a junk.all.dat | awk '$4<=133.435{print $1, $2, $3, $4, $5}' | wc -l >> fitnumb.dat

Any idea how this %s works?

Last edited by Scott; 05-07-2010 at 05:44 PM.. Reason: More code tags

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LEARN ABOUT OSX

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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