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Top Forums Shell Programming and Scripting The awk subtraction giving exponential values.Please help resolve it Post 302501949 by kunwar on Saturday 5th of March 2011 11:56:11 PM
Old 03-06-2011
The awk subtraction giving exponential values.Please help resolve it

Hi friends,
I have a file list1 which has these 2 columns like
Code:
616449 0
434453 1
2151083 0
2226536 0
2132382 0
2136814 0

I have to put the result of col1 -col2 into another file list2 linewise.

e.g. It gives the below result if use the below code:
Code:
awk '{ print $1 - $2 }' list1 > list2

616449
434453
2.15108e+06 
2.22654e+06 
2.13238e+06 
2.13681e+06

I don't want the exponential values Smilie
The problem with my code is that it turns the subtraction result into exponential for values greater than 6 digits. How should i modify the awk command (using some formatting features...i tried it but no success) to get the result in the format like given below
Code:
616449
434453
2151083
2226536 
2132382
2136814

Also if i try to convert the above exponential values to integer i use some values like 2.15108e+06 becomes 2151080 instead of required 2151083.


For now i have used the below workaround ,
But can anyone please tell me how to modify my above awk syntax to achieve it.
Code:
while read line
 do
 var1=`echo $line | awk '{ print $1}'`
 var2=`echo $line | awk '{ print $2}'`
 y=`expr $var1 - $var2`
 echo $y >> list2
done < list1

I have searched this forum number of times for this ,but no success still.Smilie


Regds,
Kunwar

Last edited by Scott; 03-06-2011 at 06:20 AM.. Reason: Please use code tags.
 

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VAR_EXPORT(3)								 1							     VAR_EXPORT(3)

var_export - Outputs or returns a parsable string representation of a variable

SYNOPSIS
mixed var_export (mixed $expression, [bool $return = false]) DESCRIPTION
var_export(3) gets structured information about the given variable. It is similar to var_dump(3) with one exception: the returned represen- tation is valid PHP code. PARAMETERS
o $expression - The variable you want to export. o $return - If used and set to TRUE, var_export(3) will return the variable representation instead of outputting it. RETURN VALUES
Returns the variable representation when the $return parameter is used and evaluates to TRUE. Otherwise, this function will return NULL. NOTES
Note When the $return parameter is used, this function uses internal output buffering so it cannot be used inside an ob_start(3) callback function. CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ | 5.1.0 | | | | | | | Possibility to export classes and arrays con- | | | taining classes using the __set_state() magic | | | method. | | | | +--------+---------------------------------------------------+ EXAMPLES
Example #1 var_export(3) Examples <?php $a = array (1, 2, array ("a", "b", "c")); var_export($a); ?> The above example will output: array ( 0 => 1, 1 => 2, 2 => array ( 0 => 'a', 1 => 'b', 2 => 'c', ), ) <?php $b = 3.1; $v = var_export($b, true); echo $v; ?> The above example will output: 3.1 Example #2 Exporting classes since PHP 5.1.0 <?php class A { public $var; } $a = new A; $a->var = 5; var_export($a); ?> The above example will output: A::__set_state(array( 'var' => 5, )) Example #3 Using __set_state() (since PHP 5.1.0) <?php class A { public $var1; public $var2; public static function __set_state($an_array) { $obj = new A; $obj->var1 = $an_array['var1']; $obj->var2 = $an_array['var2']; return $obj; } } $a = new A; $a->var1 = 5; $a->var2 = 'foo'; eval('$b = ' . var_export($a, true) . ';'); // $b = A::__set_state(array( // 'var1' => 5, // 'var2' => 'foo', // )); var_dump($b); ?> The above example will output: object(A)#2 (2) { ["var1"]=> int(5) ["var2"]=> string(3) "foo" } NOTES
Note Variables of type resource couldn't be exported by this function. Note var_export(3) does not handle circular references as it would be close to impossible to generate parsable PHP code for that. If you want to do something with the full representation of an array or object, use serialize(3). Warning When var_export(3) exports objects, the leading backslash is not included in the class name of namespaced classes for maximum com- patibility. SEE ALSO
print_r(3), serialize(3), var_dump(3). PHP Documentation Group VAR_EXPORT(3)
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