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Full Discussion: Keep only columns in first two rows based on partial header pattern.
Top Forums UNIX for Beginners Questions & Answers Keep only columns in first two rows based on partial header pattern. Post 302980579 by aachave1 on Tuesday 30th of August 2016 11:56:30 AM
Old 08-30-2016
Keep only columns in first two rows based on partial header pattern.
I have this code below that only prints out certain columns from the first two rows (doesn't affect rows 3 and beyond). How can I do the same on a partial header pattern “G_TP” instead of having to know specific column numbers (e.g. 374-479)? I've tried many other commands within this pipe with no luck.

I have 53 columns out of 600 or so that the header pattern begins with “G_TP”, but the columns may change positions and if that happens, my method below won't work any longer because of the fixed column number “374-479”.

Code:
(head -n 2 file.csv | cut -d ',' -f 374-479; tail -n +3 file.csv) > file.txt

Thank you!
 

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LEARN ABOUT LINUX

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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