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Random with Percentage Generator

/ Published in: PHP
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Here is an example where the likelihood of NS is 30%, SM is 50%, and SH is 20%. I make 20 pitches and output what the batter does each time.

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  1. <?php
  2.     $percentNS = 0.3;
  3.     $percentSM = 0.5;
  4.     $percentSH = 1.0 - $percentNS - $percentSM;
  5.  
  6.     $upperBoundNS = $percentNS;
  7.     $upperBoundSM = $percentNS + $percentSM;
  8.     $upperBoundSH = 1.0;
  9.  
  10.     for ($i = 0; $i < 20; $i++) {
  11.         $rand = rand(0, 100);
  12.         $rand = $rand / 100.0;
  13.  
  14.         if ($rand < $upperBoundNS) {
  15.             echo 'not swing';
  16.         }
  17.         else if ($rand < $upperBoundSM) {
  18.             echo 'swing and miss';
  19.         }
  20.         else {
  21.             // $rand < $upperBoundSH
  22.             echo 'swing and hit';
  23.         }
  24.  
  25.         echo '<br />';
  26.     }
  27. ?>

URL: http://www.kirupa.com/forum/showthread.php?t=344243

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