Added Random Forest Classifier (TheAlgorithms#1738)

* Added Random Forest Regressor

* Updated file to standard

* Added Random Forest Classifier (Iris dataset) and a Confusion Matrix for result visualization

Author: Miggelito

machine_learning/random_forest_classifier.py

@@ -0,0 +1,45 @@
+# Random Forest Classifier Example
+
+from sklearn.datasets import load_iris
+from sklearn.model_selection import train_test_split
+from sklearn.ensemble import RandomForestClassifier
+from sklearn.metrics import plot_confusion_matrix
+import matplotlib.pyplot as plt
+
+
+def main():
+
+    """
+    Random Tree Classifier Example using sklearn function.
+    Iris type dataset is used to demonstrate algorithm.
+    """
+
+    # Load Iris house price dataset
+    iris = load_iris()
+
+    # Split dataset into train and test data
+    X = iris["data"]  # features
+    Y = iris["target"]
+    x_train, x_test, y_train, y_test = train_test_split(
+        X, Y, test_size=0.3, random_state=1
+    )
+
+    # Random Forest Classifier
+    rand_for = RandomForestClassifier(random_state=42, n_estimators=100)
+    rand_for.fit(x_train, y_train)
+
+    # Display Confusion Matrix of Classifier
+    plot_confusion_matrix(
+        rand_for,
+        x_test,
+        y_test,
+        display_labels=iris["target_names"],
+        cmap="Blues",
+        normalize="true",
+    )
+    plt.title("Normalized Confusion Matrix - IRIS Dataset")
+    plt.show()
+
+
+if __name__ == "__main__":
+    main()