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I see that output 2 has the duplicate record where the column 6 value 213 is less than 345 except that value is a later line not a previous line. To compare the value of previous and later lines you either have to scan the file twice or read all the lines into a structure and then create the output files.

This example scans twice

# hash to hold highest values my %col6=(); while (my $line = <$data>) { chomp $line; my @fields = split "," , $line, -1; my $key = $fields[1].$fields[2]; # store max values if ( $fields[5] > $col6{$key} ){ $col6{$key} = $fields[5]; } } # reset to start seek $data,0,0; # read file 2nd time while (my $line = <$data>) { chomp $line; my @fields = split "," , $line, -1; my $key = $fields[1].$fields[2]; # reject lowest duplicate if ( $fields[5] < $col6{$key} ){ # extra text added for debugging print OUTFILE_1 $line." - duplicate $key $col6{$key}\n"; } else { print OUTFILE $line."\n"; } }

Update : This simple example assumes column 6 values are never negative.


In reply to Re: move the line if particular column is duplicate or more than 1 entries by poj
in thread move the line if particular column is duplicate or more than 1 entries by hyans.milis

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    [oiskuu]: Discipulus, from the edge or from the top?
    [Discipulus]: oiskuu from the top aka 0-0 coords
    [LanX]: edge or node?
    [oiskuu]: from each height difference, there's a fixed number of "moves right" - "moves left". So it's a number of combinations.
    [Discipulus]: I already know how much distinct paths exists but to demonstrate the property i want to have them all
    [oiskuu]: ie C(n, k); where n is height difference, k is position in the line
    [Discipulus]: infact there are 70 distinct path to reach the tale wich holds 70
    [Discipulus]: what i want is to compute them

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