01_introduction.ipynb

   "metadata": {},
   "outputs": [],
   "source": [
    "# SOLUTION STARTS HERE"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "scrolled": true,
    "tags": [
     "solution"
    ]
   },
   "outputs": [],
   "source": [
    "import seaborn as sns\n",
    "\n",
    "sns.set(style=\"ticks\")\n",
    "\n",
    "for_plot = df.copy()\n",
    "\n",
    "\n",
    "def transform_label(class_):\n",
    "    return data.target_names[class_]\n",
    "\n",
    "\n",
    "# seaborn does not work here if we use numeric values in the class\n",
    "# column, or strings which represent numbers. To fix this we\n",
    "# create textual class labels\n",
    "for_plot[\"class\"] = for_plot[\"class\"].apply(transform_label)\n",
    "sns.pairplot(for_plot, hue=\"class\", diag_kind=\"hist\");"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "tags": [
     "solution"
    ]
   },
   "outputs": [],
   "source": [
    "features = df.iloc[:, :-1]\n",
    "labels = df.iloc[:, -1]\n",
    "\n",
    "# classifier = SVC()\n",
    "classifier = LogisticRegression(max_iter=200)\n",
    "classifier.fit(features, labels)\n",
    "\n",
    "predicted_labels = classifier.predict(features)\n",
    "\n",
    "assert predicted_labels.shape == labels.shape\n",
    "print(len(labels), \"examples\")\n",
    "print(sum(predicted_labels == labels), \"labeled correctly\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Copyright (C) 2019-2021 ETH Zurich, SIS ID"
   ]
  }
 ],
 "metadata": {
  "celltoolbar": "Tags",
  "kernelspec": {
   "display_name": "Python 3",
   "language": "python",
   "name": "python3"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.7.7"
  },
  "latex_envs": {
   "LaTeX_envs_menu_present": true,
   "autoclose": false,
   "autocomplete": true,
   "bibliofile": "biblio.bib",
   "cite_by": "apalike",
   "current_citInitial": 1,
   "eqLabelWithNumbers": true,
   "eqNumInitial": 1,
   "hotkeys": {
    "equation": "Ctrl-E",
    "itemize": "Ctrl-I"
   },
   "labels_anchors": false,
   "latex_user_defs": false,
   "report_style_numbering": false,
   "user_envs_cfg": false
  },
  "toc": {
   "base_numbering": 1,
   "nav_menu": {},
   "number_sections": true,
   "sideBar": true,
   "skip_h1_title": true,
   "title_cell": "Table of Contents",
   "title_sidebar": "Contents",
   "toc_cell": false,
   "toc_position": {
    "height": "calc(100% - 180px)",
    "left": "10px",
    "top": "150px",
    "width": "288px"
   },
   "toc_section_display": true,
   "toc_window_display": true
  }
 },
 "nbformat": 4,
 "nbformat_minor": 4
}