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Full Discussion: Averaging the rows using 'awk'
Top Forums UNIX for Dummies Questions & Answers Averaging the rows using 'awk' Post 302423905 by arvindr on Sunday 23rd of May 2010 07:08:38 AM
Old 05-23-2010
Averaging the rows using 'awk'
Dear all,
I have the data in the following format. I want to do average of each NR= 5 (rows) for all the 3 ($1,$2, $3) columns and want to print average result in another file in the same format. I dont know how to write code for this in 'awk', can some one help me to write a code for this in "awk".

Code:
   $1                  $2                  $3
   4.000000E+03        4.990302E+00        5.557000E+00
   4.000050E+03        4.998532E+00        5.557000E+00
   4.000100E+03        4.995319E+00        5.557000E+00
   4.000150E+03        5.003360E+00        5.557000E+00
   4.000200E+03        5.000279E+00        5.557000E+00
   4.000250E+03        5.008273E+00        5.557000E+00
   4.000300E+03        5.005232E+00        5.557000E+00
   4.000350E+03        5.013134E+00        5.557000E+00
   4.000400E+03        5.010103E+00        5.557000E+00
   4.000450E+03        5.017992E+00        5.557000E+00
   4.000500E+03        5.014914E+00        5.557000E+00
   4.000550E+03        5.022835E+00        5.557000E+00
   4.000600E+03        5.019675E+00        5.557000E+00
   4.000650E+03        5.027411E+00        5.558000E+00
   4.000700E+03        5.024382E+00        5.558000E+00
   4.000750E+03        5.032073E+00        5.558000E+00
   4.000800E+03        5.029087E+00        5.558000E+00
   4.000850E+03        5.036683E+00        5.558000E+00
..................... ...................... ......................
.................... ....................... ........................

Last edited by Scott; 05-23-2010 at 08:25 AM.. Reason: Please use code tags
 

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LEARN ABOUT PHP

pg_num_rows

PG_NUM_ROWS(3)															    PG_NUM_ROWS(3)

pg_num_rows - Returns the number of rows in a result

SYNOPSIS

       int pg_num_rows (resource  $result)

DESCRIPTION

       pg_num_rows(3) will return the number of rows in a PostgreSQL result resource.

       Note

	       This function used to be called pg_numrows(3).

PARAMETERS

	      o $result
		- PostgreSQL query result resource, returned by pg_query(3), pg_query_params(3) or pg_execute(3) (among others).

RETURN VALUES

	The number of rows in the result. On error, -1 is returned.

EXAMPLES

       Example #1

	      pg_num_rows(3) example

	      <?php
	      $result = pg_query($conn, "SELECT 1");

	      $rows = pg_num_rows($result);

	      echo $rows . " row(s) returned.
";
	      ?>

	      The above example will output:

	      1 row(s) returned.

SEE ALSO

       pg_num_fields(3), pg_affected_rows(3).

PHP Documentation Group 													    PG_NUM_ROWS(3)
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