Implemented Rangeable trait for ranges initializers. Implemented aran…

src/PHPSci/Kernel/CArray/CArrayWrapper.php

@@ -4,18 +4,20 @@
 use PHPSci\Kernel\Initializers\Creatable;
 use PHPSci\Kernel\LinearAlgebra\Operatable;
 use PHPSci\Kernel\Orchestrator\MemoryPointer;
+use PHPSci\Kernel\Ranges\Rangeable;
 use PHPSci\Kernel\Transform\Transformable;
 use PHPSci\PHPSci;
 
 /**
  * Class CArrayWrapper
  *
+ * @author Henrique Borba <[email protected]>
  * @package PHPSci\Kernel\CArray
  */
 abstract class CArrayWrapper implements Stackable, \ArrayAccess, \Countable
 {
 
-    use Transformable, Creatable, Operatable;
+    use Transformable, Creatable, Operatable, Rangeable;
 
     /**
      * @var

src/PHPSci/Kernel/Ranges/Rangeable.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace PHPSci\Kernel\Ranges;
+
+use PHPSci\Kernel\CArray\CArrayWrapper;
+use PHPSci\Kernel\Orchestrator\MemoryPointer;
+use PHPSci\PHPSci;
+
+/**
+ * Trait Rangeable
+ *
+ * @author Henrique Borba <[email protected]>
+ * @package PHPSci\Kernel\Ranges
+ */
+trait Rangeable
+{
+
+    /**
+     * Return evenly spaced CArray with values within a given interval.
+     *
+     * Values are generated within the half-open interval [start, stop)
+     * (in other words, the interval including start but excluding stop)
+     *
+     * @author Henrique Borba <[email protected]>
+     * @param float $stop
+     * @param float $start
+     * @param float $step
+     * @return CArrayWrapper
+     */
+    public static function arange(float $stop, float $start = 0., float $step = 1.) : CArrayWrapper {
+        $new_ptr = \CArray::arange($start, $stop, $step);
+        return new PHPSci(
+                new MemoryPointer(
+                    $new_ptr,
+                    $new_ptr->rows,
+                    $new_ptr->cols
+                )
+        );
+    }
+
+}