Lecture 45 - Split Applying and Combining.ipynb

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   "cell_type": "code",
   "execution_count": 1,
   "metadata": {
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   },
   "outputs": [],
   "source": [
    "import numpy as np\n",
    "import pandas as pd\n",
    "from pandas import Series, DataFrame"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
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     "data": {
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       "<div>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>fixed acidity</th>\n",
       "      <th>volatile acidity</th>\n",
       "      <th>citric acid</th>\n",
       "      <th>residual sugar</th>\n",
       "      <th>chlorides</th>\n",
       "      <th>free sulfur dioxide</th>\n",
       "      <th>total sulfur dioxide</th>\n",
       "      <th>density</th>\n",
       "      <th>pH</th>\n",
       "      <th>sulphates</th>\n",
       "      <th>alcohol</th>\n",
       "      <th>quality</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>0</th>\n",
       "      <td>7.4</td>\n",
       "      <td>0.70</td>\n",
       "      <td>0.00</td>\n",
       "      <td>1.9</td>\n",
       "      <td>0.076</td>\n",
       "      <td>11</td>\n",
       "      <td>34</td>\n",
       "      <td>0.9978</td>\n",
       "      <td>3.51</td>\n",
       "      <td>0.56</td>\n",
       "      <td>9.4</td>\n",
       "      <td>5</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>1</th>\n",
       "      <td>7.8</td>\n",
       "      <td>0.88</td>\n",
       "      <td>0.00</td>\n",
       "      <td>2.6</td>\n",
       "      <td>0.098</td>\n",
       "      <td>25</td>\n",
       "      <td>67</td>\n",
       "      <td>0.9968</td>\n",
       "      <td>3.20</td>\n",
       "      <td>0.68</td>\n",
       "      <td>9.8</td>\n",
       "      <td>5</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2</th>\n",
       "      <td>7.8</td>\n",
       "      <td>0.76</td>\n",
       "      <td>0.04</td>\n",
       "      <td>2.3</td>\n",
       "      <td>0.092</td>\n",
       "      <td>15</td>\n",
       "      <td>54</td>\n",
       "      <td>0.9970</td>\n",
       "      <td>3.26</td>\n",
       "      <td>0.65</td>\n",
       "      <td>9.8</td>\n",
       "      <td>5</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>3</th>\n",
       "      <td>11.2</td>\n",
       "      <td>0.28</td>\n",
       "      <td>0.56</td>\n",
       "      <td>1.9</td>\n",
       "      <td>0.075</td>\n",
       "      <td>17</td>\n",
       "      <td>60</td>\n",
       "      <td>0.9980</td>\n",
       "      <td>3.16</td>\n",
       "      <td>0.58</td>\n",
       "      <td>9.8</td>\n",
       "      <td>6</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>4</th>\n",
       "      <td>7.4</td>\n",
       "      <td>0.70</td>\n",
       "      <td>0.00</td>\n",
       "      <td>1.9</td>\n",
       "      <td>0.076</td>\n",
       "      <td>11</td>\n",
       "      <td>34</td>\n",
       "      <td>0.9978</td>\n",
       "      <td>3.51</td>\n",
       "      <td>0.56</td>\n",
       "      <td>9.4</td>\n",
       "      <td>5</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "   fixed acidity  volatile acidity  citric acid  residual sugar  chlorides  \\\n",
       "0            7.4              0.70         0.00             1.9      0.076   \n",
       "1            7.8              0.88         0.00             2.6      0.098   \n",
       "2            7.8              0.76         0.04             2.3      0.092   \n",
       "3           11.2              0.28         0.56             1.9      0.075   \n",
       "4            7.4              0.70         0.00             1.9      0.076   \n",
       "\n",
       "   free sulfur dioxide  total sulfur dioxide  density    pH  sulphates  \\\n",
       "0                   11                    34   0.9978  3.51       0.56   \n",
       "1                   25                    67   0.9968  3.20       0.68   \n",
       "2                   15                    54   0.9970  3.26       0.65   \n",
       "3                   17                    60   0.9980  3.16       0.58   \n",
       "4                   11                    34   0.9978  3.51       0.56   \n",
       "\n",
       "   alcohol  quality  \n",
       "0      9.4        5  \n",
       "1      9.8        5  \n",
       "2      9.8        5  \n",
       "3      9.8        6  \n",
       "4      9.4        5  "
      ]
     },
     "execution_count": 3,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "dframe_wine = pd.read_csv('winequality_red.csv',sep=';')\n",
    "dframe_wine.head()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "def ranker(df):\n",
    "    df['alc_content_rank'] = np.arange(len(df)) + 1\n",
    "    return df"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "dframe_wine.sort_values('alcohol',ascending = False, inplace=True)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "dframe_wine = dframe_wine.groupby('quality').apply(ranker)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
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       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>fixed acidity</th>\n",
       "      <th>volatile acidity</th>\n",
       "      <th>citric acid</th>\n",
       "      <th>residual sugar</th>\n",
       "      <th>chlorides</th>\n",
       "      <th>free sulfur dioxide</th>\n",
       "      <th>total sulfur dioxide</th>\n",
       "      <th>density</th>\n",
       "      <th>pH</th>\n",
       "      <th>sulphates</th>\n",
       "      <th>alcohol</th>\n",
       "      <th>quality</th>\n",
       "      <th>alc_content_rank</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>652</th>\n",
       "      <td>15.9</td>\n",
       "      <td>0.36</td>\n",
       "      <td>0.65</td>\n",
       "      <td>7.5</td>\n",
       "      <td>0.096</td>\n",
       "      <td>22</td>\n",
       "      <td>71</td>\n",
       "      <td>0.99760</td>\n",
       "      <td>2.98</td>\n",
       "      <td>0.84</td>\n",
       "      <td>14.9</td>\n",
       "      <td>5</td>\n",
       "      <td>1</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>588</th>\n",
       "      <td>5.0</td>\n",
       "      <td>0.42</td>\n",
       "      <td>0.24</td>\n",
       "      <td>2.0</td>\n",
       "      <td>0.060</td>\n",
       "      <td>19</td>\n",
       "      <td>50</td>\n",
       "      <td>0.99170</td>\n",
       "      <td>3.72</td>\n",
       "      <td>0.74</td>\n",
       "      <td>14.0</td>\n",
       "      <td>8</td>\n",
       "      <td>1</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>142</th>\n",
       "      <td>5.2</td>\n",
       "      <td>0.34</td>\n",
       "      <td>0.00</td>\n",
       "      <td>1.8</td>\n",
       "      <td>0.050</td>\n",
       "      <td>27</td>\n",
       "      <td>63</td>\n",
       "      <td>0.99160</td>\n",
       "      <td>3.68</td>\n",
       "      <td>0.79</td>\n",
       "      <td>14.0</td>\n",
       "      <td>6</td>\n",
       "      <td>1</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>144</th>\n",
       "      <td>5.2</td>\n",
       "      <td>0.34</td>\n",
       "      <td>0.00</td>\n",
       "      <td>1.8</td>\n",
       "      <td>0.050</td>\n",
       "      <td>27</td>\n",
       "      <td>63</td>\n",
       "      <td>0.99160</td>\n",
       "      <td>3.68</td>\n",
       "      <td>0.79</td>\n",
       "      <td>14.0</td>\n",
       "      <td>6</td>\n",
       "      <td>2</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>1270</th>\n",
       "      <td>5.0</td>\n",
       "      <td>0.38</td>\n",
       "      <td>0.01</td>\n",
       "      <td>1.6</td>\n",
       "      <td>0.048</td>\n",
       "      <td>26</td>\n",
       "      <td>60</td>\n",
       "      <td>0.99084</td>\n",
       "      <td>3.70</td>\n",
       "      <td>0.75</td>\n",
       "      <td>14.0</td>\n",
       "      <td>6</td>\n",
       "      <td>3</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
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      "text/plain": [
       "      fixed acidity  volatile acidity  citric acid  residual sugar  chlorides  \\\n",
       "652            15.9              0.36         0.65             7.5      0.096   \n",
       "588             5.0              0.42         0.24             2.0      0.060   \n",
       "142             5.2              0.34         0.00             1.8      0.050   \n",
       "144             5.2              0.34         0.00             1.8      0.050   \n",
       "1270            5.0              0.38         0.01             1.6      0.048   \n",
       "\n",
       "      free sulfur dioxide  total sulfur dioxide  density    pH  sulphates  \\\n",
       "652                    22                    71  0.99760  2.98       0.84   \n",
       "588                    19                    50  0.99170  3.72       0.74   \n",
       "142                    27                    63  0.99160  3.68       0.79   \n",
       "144                    27                    63  0.99160  3.68       0.79   \n",
       "1270                   26                    60  0.99084  3.70       0.75   \n",
       "\n",
       "      alcohol  quality  alc_content_rank  \n",
       "652      14.9        5                 1  \n",
       "588      14.0        8                 1  \n",
       "142      14.0        6                 1  \n",
       "144      14.0        6                 2  \n",
       "1270     14.0        6                 3  "
      ]
     },
     "execution_count": 8,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "dframe_wine.head()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "num_of_qual = dframe_wine['quality'].value_counts()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "5    681\n",
       "6    638\n",
       "7    199\n",
       "4     53\n",
       "8     18\n",
       "3     10\n",
       "Name: quality, dtype: int64"
      ]
     },
     "execution_count": 10,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "num_of_qual"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
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       "<div>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>fixed acidity</th>\n",
       "      <th>volatile acidity</th>\n",
       "      <th>citric acid</th>\n",
       "      <th>residual sugar</th>\n",
       "      <th>chlorides</th>\n",
       "      <th>free sulfur dioxide</th>\n",
       "      <th>total sulfur dioxide</th>\n",
       "      <th>density</th>\n",
       "      <th>pH</th>\n",
       "      <th>sulphates</th>\n",
       "      <th>alcohol</th>\n",
       "      <th>quality</th>\n",
       "      <th>alc_content_rank</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>652</th>\n",
       "      <td>15.9</td>\n",
       "      <td>0.36</td>\n",
       "      <td>0.65</td>\n",
       "      <td>7.5</td>\n",
       "      <td>0.096</td>\n",
       "      <td>22</td>\n",
       "      <td>71</td>\n",
       "      <td>0.99760</td>\n",
       "      <td>2.98</td>\n",
       "      <td>0.84</td>\n",
       "      <td>14.9</td>\n",
       "      <td>5</td>\n",
       "      <td>1</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>588</th>\n",
       "      <td>5.0</td>\n",
       "      <td>0.42</td>\n",
       "      <td>0.24</td>\n",
       "      <td>2.0</td>\n",
       "      <td>0.060</td>\n",
       "      <td>19</td>\n",
       "      <td>50</td>\n",
       "      <td>0.99170</td>\n",
       "      <td>3.72</td>\n",
       "      <td>0.74</td>\n",
       "      <td>14.0</td>\n",
       "      <td>8</td>\n",
       "      <td>1</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>142</th>\n",
       "      <td>5.2</td>\n",
       "      <td>0.34</td>\n",
       "      <td>0.00</td>\n",
       "      <td>1.8</td>\n",
       "      <td>0.050</td>\n",
       "      <td>27</td>\n",
       "      <td>63</td>\n",
       "      <td>0.99160</td>\n",
       "      <td>3.68</td>\n",
       "      <td>0.79</td>\n",
       "      <td>14.0</td>\n",
       "      <td>6</td>\n",
       "      <td>1</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>821</th>\n",
       "      <td>4.9</td>\n",
       "      <td>0.42</td>\n",
       "      <td>0.00</td>\n",
       "      <td>2.1</td>\n",
       "      <td>0.048</td>\n",
       "      <td>16</td>\n",
       "      <td>42</td>\n",
       "      <td>0.99154</td>\n",
       "      <td>3.71</td>\n",
       "      <td>0.74</td>\n",
       "      <td>14.0</td>\n",
       "      <td>7</td>\n",
       "      <td>1</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>45</th>\n",
       "      <td>4.6</td>\n",
       "      <td>0.52</td>\n",
       "      <td>0.15</td>\n",
       "      <td>2.1</td>\n",
       "      <td>0.054</td>\n",
       "      <td>8</td>\n",
       "      <td>65</td>\n",
       "      <td>0.99340</td>\n",
       "      <td>3.90</td>\n",
       "      <td>0.56</td>\n",
       "      <td>13.1</td>\n",
       "      <td>4</td>\n",
       "      <td>1</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>899</th>\n",
       "      <td>8.3</td>\n",
       "      <td>1.02</td>\n",
       "      <td>0.02</td>\n",
       "      <td>3.4</td>\n",
       "      <td>0.084</td>\n",
       "      <td>6</td>\n",
       "      <td>11</td>\n",
       "      <td>0.99892</td>\n",
       "      <td>3.48</td>\n",
       "      <td>0.49</td>\n",
       "      <td>11.0</td>\n",
       "      <td>3</td>\n",
       "      <td>1</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "     fixed acidity  volatile acidity  citric acid  residual sugar  chlorides  \\\n",
       "652           15.9              0.36         0.65             7.5      0.096   \n",
       "588            5.0              0.42         0.24             2.0      0.060   \n",
       "142            5.2              0.34         0.00             1.8      0.050   \n",
       "821            4.9              0.42         0.00             2.1      0.048   \n",
       "45             4.6              0.52         0.15             2.1      0.054   \n",
       "899            8.3              1.02         0.02             3.4      0.084   \n",
       "\n",
       "     free sulfur dioxide  total sulfur dioxide  density    pH  sulphates  \\\n",
       "652                   22                    71  0.99760  2.98       0.84   \n",
       "588                   19                    50  0.99170  3.72       0.74   \n",
       "142                   27                    63  0.99160  3.68       0.79   \n",
       "821                   16                    42  0.99154  3.71       0.74   \n",
       "45                     8                    65  0.99340  3.90       0.56   \n",
       "899                    6                    11  0.99892  3.48       0.49   \n",
       "\n",
       "     alcohol  quality  alc_content_rank  \n",
       "652     14.9        5                 1  \n",
       "588     14.0        8                 1  \n",
       "142     14.0        6                 1  \n",
       "821     14.0        7                 1  \n",
       "45      13.1        4                 1  \n",
       "899     11.0        3                 1  "
      ]
     },
     "execution_count": 12,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "dframe_wine[dframe_wine.alc_content_rank == 1].head(len(num_of_qual))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  }
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