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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 PHP

utf8_encode

UTF8_ENCODE(3)								 1							    UTF8_ENCODE(3)

utf8_encode - Encodes an ISO-8859-1 string to UTF-8

SYNOPSIS

       string utf8_encode (string  $data)

DESCRIPTION

	This  function	encodes  the  string  $data  to UTF-8, and returns the encoded version.  UTF-8 is a standard mechanism used by Unicode for
       encoding wide character values into a byte stream.  UTF-8 is transparent to plain ASCII characters, is  self-synchronized  (meaning  it	is
       possible  for a program to figure out where in the bytestream characters start) and can be used with normal string comparison functions for
       sorting and such. PHP encodes UTF-8 characters in up to four bytes, like this:

       UTF-8 encoding

       +------+-------------------------------------+---+
       |bytes | 				    |	|
       |      | 				    |	|
       |      | 	       bits		    |	|
       |      | 				    |	|
       |      | 	  representation	    |	|
       |      | 				    |	|
       +------+-------------------------------------+---+
       |  1   | 				    |	|
       |      | 				    |	|
       |      | 		 7		    |	|
       |      | 				    |	|
       |      | 	     0bbbbbbb		    |	|
       |      | 				    |	|
       |  2   | 				    |	|
       |      | 				    |	|
       |      | 		11		    |	|
       |      | 				    |	|
       |      | 	 110bbbbb 10bbbbbb	    |	|
       |      | 				    |	|
       |  3   | 				    |	|
       |      | 				    |	|
       |      | 		16		    |	|
       |      | 				    |	|
       |      |     1110bbbb 10bbbbbb 10bbbbbb	    |	|
       |      | 				    |	|
       |  4   | 				    |	|
       |      | 				    |	|
       |      | 		21		    |	|
       |      | 				    |	|
       |      | 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb |	|
       |      | 				    |	|
       +------+-------------------------------------+---+
	Each b represents a bit that can be used to store character data.

PARAMETERS

	      o $data
		- An ISO-8859-1 string.

RETURN VALUES

	Returns the UTF-8 translation of $data.

SEE ALSO

       utf8_decode(3).

PHP Documentation Group 													    UTF8_ENCODE(3)
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