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Full Discussion: delete duplicated characters in each line
Top Forums Shell Programming and Scripting delete duplicated characters in each line Post 302382024 by ivpz on Monday 21st of December 2009 09:33:57 PM
Old 12-21-2009
delete duplicated characters in each line
I'm a biologist trying to analyse some data and I'll appreciate some help with the following problem. I have a column of characters which I'll like to delete the duplicated characters in each line and report only the unique one.No sorting should be done. E.g.

The original data:

GTG
CTC
CTC
CTC
GCGAGC
GCGAGC
GCGAGC
GCGAGC
GATGTG
GATGTG
GATGTG
GATGTG
A
A
C

And I'm hoping to get:

G/T/
C/T/
C/T/
C/T/
G/C/A/
G/C/A/
G/C/A/
G/C/A/
G/A/T/
G/A/T/
G/A/T/
G/A/T/
A/
A/
C/

I've tried using tr, awk with if conditions but getting nowhere.

Thank you.
 

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LEARN ABOUT MOJAVE

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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