first commit

server/vendor/markbaker/matrix/examples/test.php

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+<?php
+
+use Matrix\Matrix;
+use Matrix\Decomposition\QR;
+
+include __DIR__ . '/../vendor/autoload.php';
+
+$grid = [
+    [0, 1],
+    [-1, 0],
+];
+
+$targetGrid = [
+    [-1],
+    [2],
+];
+
+$matrix = new Matrix($grid);
+$target = new Matrix($targetGrid);
+
+$decomposition = new QR($matrix);
+
+$X = $decomposition->solve($target);
+
+echo 'X', PHP_EOL;
+var_export($X->toArray());
+echo PHP_EOL;
+
+$resolve = $matrix->multiply($X);
+
+echo 'Resolve', PHP_EOL;
+var_export($resolve->toArray());
+echo PHP_EOL;