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Top Forums Shell Programming and Scripting Selecting lines having same values for first two columns Post 302748859 by RudiC on Thursday 27th of December 2012 03:37:44 AM
Old 12-27-2012
You did not specify what should happen
a) if the third column's values are identical
b) if values can go negative
c) to lines that do not have duplicates.
Thus any proposal might need further refinement. Try:
Code:
$ awk   '{x=$1" "$2}
         $3 > Ar[x] {if (Ar[x]) print x, Ar[x] > "further"; Ar[x]=$3}
         $3 < Ar[x] {print  > "further"}
         END {for (x in Ar) print x, Ar[x]}
        ' file
1127455152 7827493958 5138
1122000518 9350066745 4464
1127021871 9312262893 4016
1123022201 9310777627 3976
$ cat further
1127021871 9312262893 3600
1127455152 7827493958 3600

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PRINT(3)								 1								  PRINT(3)

print - Output a string

SYNOPSIS
int print (string $arg) DESCRIPTION
Outputs $arg. print is not actually a real function (it is a language construct) so you are not required to use parentheses with its argument list. PARAMETERS
o $arg - The input data. RETURN VALUES
Returns 1, always. EXAMPLES
Example #1 print examples <?php print("Hello World"); print "print() also works without parentheses."; print "This spans multiple lines. The newlines will be output as well"; print "This spans multiple lines. The newlines will be output as well."; print "escaping characters is done "Like this"."; // You can use variables inside a print statement $foo = "foobar"; $bar = "barbaz"; print "foo is $foo"; // foo is foobar // You can also use arrays $bar = array("value" => "foo"); print "this is {$bar['value']} !"; // this is foo ! // Using single quotes will print the variable name, not the value print 'foo is $foo'; // foo is $foo // If you are not using any other characters, you can just print variables print $foo; // foobar print <<<END This uses the "here document" syntax to output multiple lines with $variable interpolation. Note that the here document terminator must appear on a line with just a semicolon no extra whitespace! END; ?> NOTES
Note Because this is a language construct and not a function, it cannot be called using variable functions. SEE ALSO
echo(3), printf(3), flush(3), Heredoc syntax. PHP Documentation Group PRINT(3)
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