Mean, Median, Mode, Range Of An Array

Snippet Code

This function will take an array, and either display the: mean, median, mode, or range of the array.

Introduction




The function mmmr (Mean, Median, Mode, Range) will calculate the Mean, Median, Mode, or Range of an array.

The function automatically defaults to Mean (average).



int mmmr( array $array [, str $output] )

functions.php




<?php

function mmmr($array, $output = 'mean'){

    if(!is_array($array)){

        return FALSE;

    }else{

        switch($output){

            case 'mean':

                $count = count($array);

                $sum = array_sum($array);

                $total = $sum / $count;

            break;

            case 'median':

                rsort($array);

                $middle = round(count($array) / 2);

                $total = $array[$middle-1];

            break;

            case 'mode':

                $v = array_count_values($array);

                arsort($v);

                foreach($v as $k => $v){$total = $k; break;}

            break;

            case 'range':

                sort($array);

                $sml = $array[0];

                rsort($array);

                $lrg = $array[0];

                $total = $lrg - $sml;

            break;

        }

        return $total;

    }

}



$arr = array(12,33,23,4,20,124,4,2);



// Mean = The average of all the numbers

echo 'Mean: '.mmmr($arr).'<br>';

echo 'Mean: '.mmmr($arr, 'mean').'<br>';



// Median = The middle value after the numbers are sorted smallest to largest

echo 'Median: '.mmmr($arr, 'median').'<br>';



// Mode = The number that is in the array the most times

echo 'Mode: '.mmmr($arr, 'mode').'<br>';



// Range = The difference between the highest number and the lowest number

echo 'Range: '.mmmr($arr, 'range');

?>

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