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Full Discussion: Question on the cut command
Top Forums UNIX for Dummies Questions & Answers Question on the cut command Post 302346481 by figaro on Saturday 22nd of August 2009 09:11:42 AM
Old 08-22-2009
Question on the cut command
Suppose one has a file consisting of more than 2 columns and one has to extract a few columns from this file and swap some columns at the same time. Example: extract column 1, 2 and 4 from a file foo.csv and place them in the order 2, 4 and 1 into file foo.txt. I would be inclined to do this:
Code:
cut -f 2,4,1 -d , foo.csv > foo.txt

However, cut does not allow swapping columns in this way and the order of columns is maintained in the output file. I just wanted to get some experts opinions on this, whether this is true for all shells, never implemented or never a requirement?

Thanks in advance
 

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LEARN ABOUT OSX

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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