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Top Forums Shell Programming and Scripting Script to find the average of a given column and also for specified number of rows?? Post 302282844 by ks_reddy on Monday 2nd of February 2009 03:17:28 AM
Old 02-02-2009
Hi Johnson Thanks for your quick reply...
But there is one correction in my input data..
My data looks like this..

SNO Day CITY Col1 Col2 Col3 ........... So on
1 02/01/09 MAS 1 2 3
2 02/01/09 MAS 4 5 6
3 02/01/09 MAS 7 8 9
4 02/01/09 Delhi 10 11 12
5 02/01/09 Delhi 13 14 15
6 02/01/09 Delhi 16 17 18
7 02/01/09 Delhi 20 21 19
8 02/01/09 Mumbai 22 46 56
9 02/01/09 Mumbai 67 34 54
......................................................................... an so on.

I need to find the average of column 6(for example, there are around 40 columns in my files) for only the rows which contains Delhi in a given column(in this case it is col3). I hope you understand what I am asking.. It will be a great help for me if you can modified your previous script...
 

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COLUMN(1)						    BSD General Commands Manual 						 COLUMN(1)

NAME
column -- columnate lists SYNOPSIS
column [-tx] [-c columns] [-s sep] [file ...] DESCRIPTION
The column utility formats its input into multiple columns. Rows are filled before columns. Input is taken from file operands, or, by default, from the standard input. Empty lines are ignored. The options are as follows: -c Output is formatted for a display columns wide. -s Specify a set of characters to be used to delimit columns for the -t option. -t Determine the number of columns the input contains and create a table. Columns are delimited with whitespace, by default, or with the characters supplied using the -s option. Useful for pretty-printing displays. -x Fill columns before filling rows. Column exits 0 on success, >0 if an error occurred. ENVIRONMENT
COLUMNS The environment variable COLUMNS is used to determine the size of the screen if no other information is available. EXAMPLES
(printf "PERM LINKS OWNER GROUP SIZE MONTH DAY HH:MM/YEAR NAME " ; ls -l | sed 1d) | column -t SEE ALSO
colrm(1), ls(1), paste(1), sort(1) HISTORY
The column command appeared in 4.3BSD-Reno. AVAILABILITY
The column command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/. BSD
June 6, 1993 BSD
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