| 1 |
<?php |
| 2 |
/** |
| 3 |
* Copyright (C) 2020 Graham Breach |
| 4 |
* |
| 5 |
* This program is free software: you can redistribute it and/or modify |
| 6 |
* it under the terms of the GNU Lesser General Public License as published by |
| 7 |
* the Free Software Foundation, either version 3 of the License, or |
| 8 |
* (at your option) any later version. |
| 9 |
* |
| 10 |
* This program is distributed in the hope that it will be useful, |
| 11 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 |
* GNU Lesser General Public License for more details. |
| 14 |
* |
| 15 |
* You should have received a copy of the GNU Lesser General Public License |
| 16 |
* along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 17 |
*/ |
| 18 |
/** |
| 19 |
* For more information, please contact <graham@goat1000.com> |
| 20 |
*/ |
| 21 |
|
| 22 |
namespace Goat1000\SVGGraph; |
| 23 |
|
| 24 |
/** |
| 25 |
* Class for making averages work on Histograms |
| 26 |
*/ |
| 27 |
class HistogramAverage extends Average { |
| 28 |
|
| 29 |
/** |
| 30 |
* Calculates the mean average for a dataset |
| 31 |
*/ |
| 32 |
protected function calculate(&$values, $dataset) |
| 33 |
{ |
| 34 |
$sum = 0; |
| 35 |
$count = 0; |
| 36 |
foreach($values[$dataset] as $p) { |
| 37 |
if($p->value === null) |
| 38 |
continue; |
| 39 |
$sum += $p->value; |
| 40 |
++$count; |
| 41 |
} |
| 42 |
|
| 43 |
// histogram data ends with a 0 to pad the axis out |
| 44 |
--$count; |
| 45 |
|
| 46 |
return $count > 0 ? $sum / $count : null; |
| 47 |
} |
| 48 |
} |
| 49 |
|
