octoleo/php-ml
1
0
Fork 0
mirror of https://github.com/Llewellynvdm/php-ml.git synced 2024-06-12 21:32:22 +00:00
Code Issues Packages Projects Releases Wiki Activity

improve matrix inverse

Browse Source
This commit is contained in:
Arkadiusz Kondas 2016-04-30 23:47:35 +02:00
parent f7b91bea72
commit 2952557028
1 changed files with 3 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
src/Phpml/Math/Matrix.php
View File

@ -53,7 +53,7 @@ class Matrix
/** /**
* @param array $array * @param array $array
* *
* @return Matrix * @return Matrix
*/ */
public static function fromFlatArray(array $array) public static function fromFlatArray(array $array)
@ -225,12 +225,8 @@ class Matrix
$newMatrix = array(); $newMatrix = array();
for ($i = 0; $i < $this->rows; ++$i) { for ($i = 0; $i < $this->rows; ++$i) {
for ($j = 0; $j < $this->columns; ++$j) { for ($j = 0; $j < $this->columns; ++$j) {
$subMatrix = $this->crossOut($i, $j); $minor = $this->crossOut($i, $j)->getDeterminant();
if (fmod($i + $j, 2) == 0) { $newMatrix[$i][$j] = fmod($i + $j, 2) == 0 ? $minor : -$minor;
$newMatrix[$i][$j] = ($subMatrix->getDeterminant());
} else {
$newMatrix[$i][$j] = -($subMatrix->getDeterminant());
}
} }
} }