docs for files dataset and php-cs-fixer

README.md

@@ -61,7 +61,9 @@ composer require php-ai/php-ml
     * [Token Count Vectorizer](http://php-ml.readthedocs.io/en/latest/machine-learning/feature-extraction/token-count-vectorizer/)
     * [Tf-idf Transformer](http://php-ml.readthedocs.io/en/latest/machine-learning/feature-extraction/tf-idf-transformer/)
 * Datasets
+    * [Array](http://php-ml.readthedocs.io/en/latest/machine-learning/datasets/array-dataset/)
     * [CSV](http://php-ml.readthedocs.io/en/latest/machine-learning/datasets/csv-dataset/)
+    * [Files](http://php-ml.readthedocs.io/en/latest/machine-learning/datasets/files-dataset/)
     * Ready to use:
         * [Iris](http://php-ml.readthedocs.io/en/latest/machine-learning/datasets/demo/iris/)
         * [Wine](http://php-ml.readthedocs.io/en/latest/machine-learning/datasets/demo/wine/)

docs/index.md

@@ -61,7 +61,9 @@ composer require php-ai/php-ml
     * [Token Count Vectorizer](machine-learning/feature-extraction/token-count-vectorizer/)
     * [Tf-idf Transformer](machine-learning/feature-extraction/tf-idf-transformer/)
 * Datasets
+    * [Array](machine-learning/datasets/array-dataset/)
     * [CSV](machine-learning/datasets/csv-dataset/)
+    * [Files](machine-learning/datasets/files-dataset/)
     * Ready to use:
         * [Iris](machine-learning/datasets/demo/iris/)
         * [Wine](machine-learning/datasets/demo/wine/)

docs/machine-learning/datasets/files-dataset.md

@@ -0,0 +1,57 @@
+# FilesDataset
+
+Helper class that loads dataset from files. Use folder names as targets. It extends the `ArrayDataset`.
+
+### Constructors Parameters
+
+* $rootPath - (string) path to root folder that contains files dataset
+
+```
+use Phpml\Dataset\FilesDataset;
+
+$dataset = new FilesDataset('path/to/data');
+```
+
+See [ArrayDataset](machine-learning/datasets/array-dataset/) for more information.
+
+### Example
+
+Files structure:
+
+```
+data
+    business
+        001.txt
+        002.txt
+        ...
+    entertainment
+        001.txt
+        002.txt
+        ...
+    politics
+        001.txt
+        002.txt
+        ...
+    sport
+        001.txt
+        002.txt
+        ...
+    tech
+        001.txt
+        002.txt
+        ...
+```
+
+Load files data with `FilesDataset`: 
+
+```
+use Phpml\Dataset\FilesDataset;
+
+$dataset = new FilesDataset('path/to/data');
+
+$dataset->getSamples()[0][0]  // content from file path/to/data/business/001.txt
+$dataset->getTargets()[0]     // business
+
+$dataset->getSamples()[40][0] // content from file path/to/data/tech/001.txt
+$dataset->getTargets()[0]     // tech
+```

mkdocs.yml

@@ -29,6 +29,7 @@ pages:
     - Datasets:
       - Array Dataset: machine-learning/datasets/array-dataset.md
       - CSV Dataset: machine-learning/datasets/csv-dataset.md
+      - Files Dataset: machine-learning/datasets/files-dataset.md
       - Ready to use datasets:
         - Iris: machine-learning/datasets/demo/iris.md
         - Wine: machine-learning/datasets/demo/wine.md

src/Phpml/Dataset/FilesDataset.php

@@ -1,5 +1,6 @@
 <?php
-declare(strict_types = 1);
+
+declare (strict_types = 1);
 
 namespace Phpml\Dataset;
 
@@ -26,7 +27,7 @@ class FilesDataset extends ArrayDataset
      */
     private function scanRootPath(string $rootPath)
     {
-        foreach(glob($rootPath . DIRECTORY_SEPARATOR . '*', GLOB_ONLYDIR) as $dir) {
+        foreach (glob($rootPath.DIRECTORY_SEPARATOR.'*', GLOB_ONLYDIR) as $dir) {
             $this->scanDir($dir);
         }
     }
@@ -38,10 +39,9 @@ class FilesDataset extends ArrayDataset
     {
         $target = basename($dir);
 
-        foreach(array_filter(glob($dir. DIRECTORY_SEPARATOR . '*'), 'is_file') as $file) {
+        foreach (array_filter(glob($dir.DIRECTORY_SEPARATOR.'*'), 'is_file') as $file) {
             $this->samples[] = [file_get_contents($file)];
             $this->targets[] = $target;
         }
     }
-
 }

tests/Phpml/Dataset/FilesDatasetTest.php

@@ -31,8 +31,13 @@ class FilesDatasetTest extends \PHPUnit_Framework_TestCase
         $firstSample = file_get_contents($rootPath.'/business/001.txt');
         $this->assertEquals($firstSample, $dataset->getSamples()[0][0]);
 
+        $firstTarget = 'business';
+        $this->assertEquals($firstTarget, $dataset->getTargets()[0]);
+
         $lastSample = file_get_contents($rootPath.'/tech/010.txt');
         $this->assertEquals($lastSample, $dataset->getSamples()[49][0]);
-    }
 
+        $lastTarget = 'tech';
+        $this->assertEquals($lastTarget, $dataset->getTargets()[49]);
+    }
 }