docs: create notebook for Titanic example (#21)

### Summary of Changes

Create a notebook to describe the Titanic example, including a sample,
its schema, and some statistics.

docs/examples/titanic.ipynb

@@ -0,0 +1,99 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "source": [
+    "# Titanic\n",
+    "\n",
+    "Based on the [\"Titanic\" dataset](https://www.openml.org/search?type=data&sort=runs&id=40945&status=active) by Frank E. Harrell Jr. and Thomas Cason:\n",
+    "\n",
+    "> The original Titanic dataset, describing the survival status of individual passengers on the Titanic. The titanic data does not contain information from the crew, but it does contain actual ages of half of the passengers. The principal source for data about Titanic passengers is the Encyclopedia Titanica. The datasets used here were begun by a variety of researchers. One of the original sources is Eaton & Haas (1994) Titanic: Triumph and Tragedy, Patrick Stephens Ltd, which includes a passenger list created by many researchers and edited by Michael A. Findlay.\n",
+    ">\n",
+    "> Thomas Cason of UVa has greatly updated and improved the titanic data frame using the Encyclopedia Titanica and created the dataset here. Some duplicate passengers have been dropped, many errors corrected, many missing ages filled in, and new variables created.\n",
+    "\n",
+    "## Sample\n"
+   ],
+   "metadata": {
+    "collapsed": false
+   }
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "outputs": [],
+   "source": [
+    "from safeds_examples.tabular import load_titanic\n",
+    "\n",
+    "titanic = load_titanic()\n",
+    "titanic.slice(end=10)"
+   ],
+   "metadata": {
+    "collapsed": false,
+    "pycharm": {
+     "is_executing": true
+    }
+   }
+  },
+  {
+   "cell_type": "markdown",
+   "source": [
+    "## Schema"
+   ],
+   "metadata": {
+    "collapsed": false
+   }
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "outputs": [],
+   "source": [
+    "titanic.schema\n"
+   ],
+   "metadata": {
+    "collapsed": false
+   }
+  },
+  {
+   "cell_type": "markdown",
+   "source": [
+    "## Statistics"
+   ],
+   "metadata": {
+    "collapsed": false
+   }
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "outputs": [],
+   "source": [
+    "titanic.summary()\n"
+   ],
+   "metadata": {
+    "collapsed": false
+   }
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.6"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}

mkdocs.yml

@@ -7,7 +7,7 @@ nav:
     - README.md
     - Changelog: CHANGELOG.md
   - Examples:
-    - Titanic: examples/titanic.md
+    - Titanic: examples/titanic.ipynb
   - API Reference: reference/
   - Development:
     - Environment: development/environment.md
@@ -64,7 +64,6 @@ plugins:
       include: ["*.ipynb"]
       execute: true
       allow_errors: false
-      include_source: true
 
 watch:
   - src