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Top Forums Shell Programming and Scripting how to delete duplicate rows based on last column Post 302347174 by reva on Tuesday 25th of August 2009 04:39:26 AM
Old 08-25-2009
how to delete duplicate rows based on last column

hii i have a huge amt of data stored in a file.Here in this file i need to remove duplicates rows in such a way that the last column has different data & i must check for greatest among last colmn data & print the largest data along with other entries but just one of other duplicate entries is needed .For example the given file which looks like this
1902 8 22 3 40.0000 77.0000 8.60
1902 8 22 3 40.0000 76.5000 8.20
1902 8 22 3 40.0000 76.5000 8.30
1902 8 22 3 40.0000 77.0000 8.40
1902 8 22 3 39.8000 76.2000 8.10
1902 9 30 6 38.5000 67.0000 7.70
1902 9 30 6 38.5000 67.0000 6.30
1902 10 6 9 36.5000 70.5000 7.20
1902 12 4 22 37.8000 65.5000 4.90

Now i want the output for such a file as below
1902 8 22 3 40.0000 77.0000 8.60
1902 8 22 3 40.0000 76.5000 8.30
1902 8 22 3 39.8000 76.2000 8.10
1902 9 30 6 36.5000 67.0000 7.70
1902 10 6 9 36.5000 70.5000 7.20
1902 12 4 22 37.8000 65.5000 4.90
------
Smilie

Last edited by reva; 08-25-2009 at 06:17 AM..
 

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Layout::Manager::Grid(3pm)				User Contributed Perl Documentation				Layout::Manager::Grid(3pm)

NAME
Layout::Manager::Grid - Simple grid-based layout manager. DESCRIPTION
Layout::Manager::Grid is a layout manager places components into evenly divided cells. When you instantiate a Grid manager, you must supply it with a count of how many rows and columns it will have. For example, a Grid with 1 column and 2 rows would look like: +--------------------------------+ | | | component 1 | | | +--------------------------------+ | | | component 2 | | | +--------------------------------+ The container is divided into as many <rows> * <columns> cells, with each taking up an equal amount of space. A grid with 3 columns and 2 rows would create 6 cells that consume 33% of the width and 50% of the height. Components are placed by specifying the cell they reside in via the row and column number. $container->add_component($comp, { row => 0, column => 3 }); $container->add_component($comp, { row => 0, column => 2, height => 2 }); Optionally, you may choose to override the default "width" or "height" of 1. Setting it to a something else will cause the component to consume that many rows or columns worth of space. Grid is similar to Java's GridLayout <http://java.sun.com/docs/books/tutorial/uiswing/layout/grid.html>. SYNOPSIS
$cont->add_component($comp1, { row => 0, column => 1 }); $cont->add_component($comp2, { row => 0, column => 2 }); my $lm = Layout::Manager::Grid->new(rows => 1, columns => 2); $lm->do_layout($con); DYNAMIC SIZING If the container that the Grid is manging does not have one or both of it's dimensions set, Grid will compute the appropriate sizes. The simple way for me to avoid writing a long explanation is to say it works similar to HTML tables. Rows will become as big as their biggest consituent, as will columns. It is common to add a Grid-managed component to a scene with only one of it's dimensions set. ATTRIBUTES
columns The number of columns in this Grid. rows The number of rows in this Grid. METHODS
do_layout Size and position the components in this layout. AUTHOR
Cory Watson, "<gphat@cpan.org>" COPYRIGHT &; LICENSE Copyright 2008 - 2010 Cory G Watson This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.12.3 2011-05-16 Layout::Manager::Grid(3pm)
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