update readme

README.md

@@ -26,106 +26,10 @@ This package is designed to offer flexibility in matrix manipulation, enabling d
 composer require divengine/matrix
 ```
 
-## Basic usage
+## Documentation 
 
-```php
-<?php
+https://divengine.org/docs/div-php-matrix
 
-// Create a matrix
-$table = new matrix([
-    ["Product", "Price", "Count"],
-    ["Apple", 10, 2],
-    ["Banana", 35, 3],
-    ["Orange", 6, 10],
-]);
-
-// Show the matrix
-echo $table->format('txt', true);
-
-$table->addColumn();
-$table->set(0, 3, "Amount");
-
-// Fill the column with the product of the previous two columns
-$table->fillVertical(3, 1, 3, 
-    fn ($r, $c, matrix $m) 
-        => $m->get($r, $c - 1) * $m->get($r, $c - 2));
-
-// Add a row with the sum of the previous rows
-$table->addRow(["Total", "", "", 
-    fn ($r, $c, matrix $m) 
-        => array_sum($m->vertical($c, 1, $r - 1))]);
-echo $table->format('txt', true);
-
-// Add a column with the sum of the previous columns
-$table->addColumn();
-$table->set(0, 4, "Cumul");
-
-// Fill the column with the sum of the previous column
-$table->fillVertical(4, 1, 3, 
-    fn ($r, $c, matrix $m) 
-        => $r == 1 ? $m->get($r, $c - 1) 
-        : $m->get($r - 1, $c) + $m->get($r, $c - 1));
-
-echo $table->format('txt', true);
-
-// Change a value of the second row
-$table->set(1, 1, 20);
-echo $table->format('txt', true);
-
-// Remove the second row
-$table->removeRow(1);
-echo $table->format('txt', true);
-
-// Show ranges
-print_r($table->vertical(1, 1, 2));
-print_r($table->horizontal(1, 1, 2));
-
-// Serialize
-echo $table->format('serialize');
-```
-
-Ouput:
-
-```shell
-Product Price   Count
-Apple   10      2
-Banana  35      3
-Orange  6       10
-
-Product Price   Count   Amount
-Apple   10      2       20
-Banana  35      3       105
-Orange  6       10      60
-Total                   185
-
-Product Price   Count   Amount  Cumul
-Apple   10      2       20      20
-Banana  35      3       105     125
-Orange  6       10      60      185
-Total                   185
-
-Product Price   Count   Amount  Cumul
-Apple   20      2       40      40
-Banana  35      3       105     145
-Orange  6       10      60      205
-Total                   205
-
-Product Price   Count   Amount  Cumul
-Banana  35      3       105     105
-Orange  6       10      60      165
-Total                   165
-
-Array
-(
-    [0] => 35
-    [1] => 6
-)
-
-Array
-(
-    [0] => 35
-    [1] => 3
-)
-
-```
+## Examples
 
+See "examples" folder.

examples/calculations.php

@@ -0,0 +1,57 @@
+<?php
+
+include __DIR__ . "/../src/matrix.php";
+
+use divengine\matrix;
+
+// Create a matrix
+$table = new matrix([
+    ["Product", "Price", "Count"],
+    ["Apple", 10, 2],
+    ["Banana", 35, 3],
+    ["Orange", 6, 10],
+]);
+
+// Show the matrix
+echo $table->format('txt', true);
+
+$table->addColumn();
+$table->set(0, 3, "Amount");
+
+// Fill the column with the product of the previous two columns
+$table->fillVertical(3, 1, 3, 
+    fn ($r, $c, matrix $m) 
+        => $m->get($r, $c - 1) * $m->get($r, $c - 2));
+
+// Add a row with the sum of the previous rows
+$table->addRow(["Total", "", "", 
+    fn ($r, $c, matrix $m) 
+        => array_sum($m->vertical($c, 1, $r - 1))]);
+echo $table->format('txt', true);
+
+// Add a column with the sum of the previous columns
+$table->addColumn();
+$table->set(0, 4, "Cumul");
+
+// Fill the column with the sum of the previous column
+$table->fillVertical(4, 1, 3, 
+    fn ($r, $c, matrix $m) 
+        => $r == 1 ? $m->get($r, $c - 1) 
+        : $m->get($r - 1, $c) + $m->get($r, $c - 1));
+
+echo $table->format('txt', true);
+
+// Change a value of the second row
+$table->set(1, 1, 20);
+echo $table->format('txt', true);
+
+// Remove the second row
+$table->removeRow(1);
+echo $table->format('txt', true);
+
+// Show ranges
+print_r($table->vertical(1, 1, 2));
+print_r($table->horizontal(1, 1, 2));
+
+// Serialize
+echo $table->format('serialize');