Added PCA machine learning pipeline

Author: mGalarnyk

.DS_Store

@@ -526,6 +526,11 @@
     "Use a PCA projection to 2d to visualize the entire data set. You should plot different classes using different colors or shapes. Do the classes seem well-separated from each other? "
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": []
+  },
   {
    "cell_type": "code",
    "execution_count": 14,