Add explanation that the summary behavior changed between pandas 0.12 and 0.13

Author: jvns

cookbook/Chapter 2 - Selecting data & finding the most common complaint type.ipynb

@@ -17,9 +17,12 @@
       "import matplotlib.pyplot as plt\n",
       "\n",
       "# Make the graphs a bit prettier, and bigger\n",
-      "pd.set_option('display.mpl_style', 'default') \n",
+      "pd.set_option('display.mpl_style', 'default')\n",
+      "\n",
+      "# This is necessary to show lots of columns in pandas 0.12. \n",
+      "# Not necessary in pandas 0.13.\n",
       "pd.set_option('display.line_width', 5000) \n",
-      "pd.set_option('display.max_columns', 60) \n",
+      "pd.set_option('display.max_columns', 60)\n",
       "\n",
       "plt.rcParams['figure.figsize'] = (15, 5)"
      ],
@@ -75,7 +78,9 @@
      "cell_type": "markdown",
      "metadata": {},
      "source": [
-      "When you look at a large dataframe, instead of showing you the contents of the dataframe, it'll show you a *summary*. This includes all the columns, and how many non-null values there are in each column."
+      "When you print a large dataframe, it will only show you the first few rows.\n",
+      "\n",
+      "If you don't see this, don't panic! The default behavior for large dataframes changed between pandas 0.12 and 0.13. Previous to 0.13 it would show you a summary of the dataframe. This includes all the columns, and how many non-null values there are in each column."
      ]
     },
     {
@@ -3511,7 +3516,7 @@
        ],
        "metadata": {},
        "output_type": "pyout",
-       "prompt_number": 3,
+       "prompt_number": 4,
        "text": [
         "    Unique Key            Created Date             Closed Date Agency                                        Agency Name            Complaint Type                        Descriptor                  Location Type Incident Zip           Incident Address          Street Name     Cross Street 1                    Cross Street 2 Intersection Street 1 Intersection Street 2  Address Type                 City Landmark Facility Type    Status                Due Date Resolution Action Updated Date       Community Board        Borough  X Coordinate (State Plane)  Y Coordinate (State Plane) Park Facility Name   Park Borough  School Name School Number School Region  School Code School Phone Number School Address  School City School State   School Zip School Not Found  School or Citywide Complaint Vehicle Type Taxi Company Borough Taxi Pick Up Location Bridge Highway Name Bridge Highway Direction Road Ramp Bridge Highway Segment Garage Lot Name Ferry Direction Ferry Terminal Name   Latitude  Longitude                                  Location\n",
         "0     26589651  10/31/2013 02:08:41 AM                     NaN   NYPD                    New York City Police Department   Noise - Street/Sidewalk                      Loud Talking                Street/Sidewalk        11432           90-03 169 STREET           169 STREET          90 AVENUE                         91 AVENUE                   NaN                   NaN       ADDRESS              JAMAICA      NaN      Precinct  Assigned  10/31/2013 10:08:41 AM         10/31/2013 02:35:17 AM             12 QUEENS         QUEENS                     1042027                      197389        Unspecified         QUEENS  Unspecified   Unspecified   Unspecified  Unspecified         Unspecified    Unspecified  Unspecified  Unspecified  Unspecified                N                           NaN          NaN                  NaN                   NaN                 NaN                      NaN       NaN                    NaN             NaN             NaN                 NaN  40.708275 -73.791604   (40.70827532593202, -73.79160395779721)\n",
@@ -3580,7 +3585,15 @@
        ]
       }
      ],
-     "prompt_number": 3
+     "prompt_number": 4
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [],
+     "language": "python",
+     "metadata": {},
+     "outputs": []
     },
     {
      "cell_type": "markdown",