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Top Forums Shell Programming and Scripting awk search for max and min while ignoring special character Post 302950861 by ncwxpanther on Wednesday 29th of July 2015 01:08:47 PM
Old 07-29-2015
Quote:
Originally Posted by neutronscott

Code:
$ awk  'NR==1 {min=$2; next} NF>1 && $2<min {min=$2} END {print min}' input
39.5520

$ awk  'NR==1 {max=$1; next} NF>1 && $1>max {max=$1} END {print max}' input
-119.9950


Thanks. I got these 2 scripts to print the min and max of each column separately. Whats the best way to combine these into a single line?

Code:
awk 'FNR==1 {min=$1;max=$1;next} NF>1{if($1<min) min=$1; if ($1>max) max=$1} END {print max, min}'
awk 'FNR==1 {min=$2;max=$2;next} NF>1{if($2<min) min=$2; if ($2>max) max=$2} END {print max, min}'

Output
Code:
MinColumn1 MaxColumn1 MinColumn2 MaxColumn2

 

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RAND(3) 								 1								   RAND(3)

rand - Generate a random integer

SYNOPSIS
int rand (void ) DESCRIPTION
int rand (int $min, int $max) If called without the optional $min, $max arguments rand(3) returns a pseudo-random integer between 0 and getrandmax(3). If you want a random number between 5 and 15 (inclusive), for example, use rand(5, 15). Caution This function does not generate cryptographically secure values, and should not be used for cryptographic purposes. If you need a cryptographically secure value, consider using random_int(3), random_bytes(3), or openssl_random_pseudo_bytes(3) instead. Note On some platforms (such as Windows), getrandmax(3) is only 32767. If you require a range larger than 32767, specifying $min and $max will allow you to create a range larger than this, or consider using mt_rand(3) instead. PARAMETERS
o $min - The lowest value to return (default: 0) o $max - The highest value to return (default: getrandmax(3)) RETURN VALUES
A pseudo random value between $min (or 0) and $max (or getrandmax(3), inclusive). EXAMPLES
Example #1 rand(3) example <?php echo rand() . " "; echo rand() . " "; echo rand(5, 15); ?> The above example will output something similar to: 7771 22264 11 SEE ALSO
srand(3), getrandmax(3), mt_rand(3), random_int(3), random_bytes(3), openssl_random_pseudo_bytes(3). PHP Documentation Group RAND(3)
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