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Top Forums Shell Programming and Scripting Evaluate 2 columns, add sum IF two columns match on two rows Post 302841491 by RudiC on Wednesday 7th of August 2013 12:39:45 PM
Old 08-07-2013
Code:
awk -F, 'NR==1;                                 # print line #1 as is (pattern is true; print is default action)
         NR>1 {Arr[$1","$2]+=$3}                # create (or use if exists) array indexed by $1,$2 and sum $3 into it
         END{for (i in Arr) print i","Arr[i]}   # At EOF, run i through the indices of array, print it, and the array element poited to by i
        ' file

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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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