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Full Discussion: remove consecutive duplicate rows
Top Forums Shell Programming and Scripting remove consecutive duplicate rows Post 302529171 by LMHmedchem on Wednesday 8th of June 2011 05:25:20 PM
Old 06-08-2011
remove consecutive duplicate rows
I have some data that looks like,
Code:
1    3300665.mol   3300665    5177008   102.093
2    3300665.mol   3300665    5177008   102.093
3    3294015.mol   3294015    5131552   102.114
4    3294015.mol   3294015    5131552   102.114
5    3293734.mol   3293734    5129625   104.152
6    3293734.mol   3293734    5129625   104.152
7    3347497.mol   3347497    5510897   109.15
8    3294070.mol   3294070    5132258   113.096
9    3295423.mol   3295423    5141084   114.11
10   3295423.mol   3295423    5141084   114.11
11   3347551.mol   3347551    5511243   114.165
12   3347551.mol   3347551    5511243   114.165
13   3290635.mol   3290635    5108661   116.16
14   3290635.mol   3290635    5108661   116.16
15   3347550.mol   3347550    5511242   117.107
16   3347550.mol   3347550    5511242   117.107
17   3293127.mol   3293127    5119773   118.193
18   3293127.mol   3293127    5119773   118.193
19   3382893.mol   3382893    5728430   119.181
20   3382893.mol   3382893    5728430   119.181

with ~150,000 rows. I need to look for instances where the value in col $1 is the same in consecutive rows. When a duplicate row is found, I need to remove the duplicate row, and write it to a second file. I guess you would just create two new files, one with a single copy of each line (whether or not the row occurs one or more than once in the input file), and a second file that gives the rows that were found to be duplicates.

Minimal set of all rows (dups have been removed):
Code:
1    3300665.mol   3300665    5177008   102.093
3    3294015.mol   3294015    5131552   102.114
5    3293734.mol   3293734    5129625   104.152
7    3347497.mol   3347497    5510897   109.15
8    3294070.mol   3294070    5132258   113.096
9    3295423.mol   3295423    5141084   114.11
11   3347551.mol   3347551    5511243   114.165
13   3290635.mol   3290635    5108661   116.16
15   3347550.mol   3347550    5511242   117.107
17   3293127.mol   3293127    5119773   118.193
19   3382893.mol   3382893    5728430   119.181


Duplicates file:
Code:
 2    3300665.mol   3300665    5177008   102.093
 4    3294015.mol   3294015    5131552   102.114
 6    3293734.mol   3293734    5129625   104.152
 10   3295423.mol   3295423    5141084   114.11
 12   3347551.mol   3347551    5511243   114.165
 14   3290635.mol   3290635    5108661   116.16
 16   3347550.mol   3347550    5511242   117.107
 18   3293127.mol   3293127    5119773   118.193
 20   3382893.mol   3382893    5728430   119.181

I'm not sure how to go about this, and I can't do it in excel, so some assistance would be appreciated. There could be instances of 3 or more in a row, I'm not sure. I guess it makes sense to just keep the first instance of each multiple.

LMHmedchem
 

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