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Full Discussion: Compare 2 columns from the same file and print a value depending on the result
Top Forums Shell Programming and Scripting Compare 2 columns from the same file and print a value depending on the result Post 303003010 by ksennin on Wednesday 6th of September 2017 02:40:34 PM
Old 09-06-2017
Question Compare 2 columns from the same file and print a value depending on the result
Hello Unix gurus,

I have a file with this format (example values):
Code:
label1	1	0
label2	1	0
label3	0.4	0.6
label4	0.5	0.5
label5	0.1	0.9
label6	0.9	0.1

in which:
column 1 is a row label
column 2 and 3 are values

I would like to do a simple operation on this table and get the following output file:
Code:
label1	0
label2	0
label3	2
label4	1
label5	2
label6	0

in which the value in column 2 is:
"0" if input column 2 > input column 3
"1" if input column 2 = input column 3
"2" if input column 2 < input column 3

I think is possible in bash/awk but I am not sure (other possibilities welcome)

Many thanks for your help and time.

KS
Last edited by ksennin; 09-06-2017 at 04:01 PM..
 

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LEARN ABOUT FREEBSD

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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