fix time series printing (again)

Author: amueller

04-representing-data-feature-engineering.ipynb

@@ -2055,7 +2055,7 @@
     "plt.figure(figsize=(10, 3))\n",
     "xticks = pd.date_range(start=citibike.index.min(), end=citibike.index.max(),\n",
     "                       freq='D')\n",
-    "plt.xticks(xticks.astype(\"int\"), xticks.strftime(\"%a %m-%d\"), rotation=90, ha=\"left\")\n",
+    "plt.xticks(xticks, xticks.strftime(\"%a %m-%d\"), rotation=90, ha=\"left\")\n",
     "plt.plot(citibike, linewidth=1)\n",
     "plt.xlabel(\"Date\")\n",
     "plt.ylabel(\"Rentals\")"