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Full Discussion: Absolute and maximum
Top Forums UNIX for Dummies Questions & Answers Absolute and maximum Post 302626121 by cosmologist on Thursday 19th of April 2012 01:21:18 AM
Old 04-19-2012
Absolute and maximum

I have a big file with 127 columns and 869 rows. What I am trying to do is to get the absolute value of all numbers in the file, and then get the maximum of each column.

If this was for one column it wouldn't be a problem, I would use:

Code:
awk '{ print ($1 >= 0) ? $1 : 0 - $1}' file > out1
sort -n out1 > out2
tail out2> out3

But I don't know how could this be done in a larger file. Any help would be much appreciated.

Thanks!

Last edited by cosmologist; 04-19-2012 at 02:21 PM..
 

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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. BSD
June 6, 1993 BSD
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