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Top Forums UNIX for Dummies Questions & Answers How do I sum one column based on another column? Post 302316235 by phil_heath on Thursday 14th of May 2009 12:35:52 PM
Old 05-14-2009
How do I sum one column based on another column?

Hi,

I am new to this forum and new to awk.

I have a file that contains 2 columns.

Heres an example of what it looks like:

10 +
20 +
40 +
50 -
70 -

So the file is tab-delimited. What I want to do is add 10 to column 1 whenever column 2 is + and substract 10 from column 1 whenever column 2 is -.

So the final output would look like this

20 +
30 +
50 +
40 -
60 -

Could someone help me on this one?

Thanks
 

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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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