将XML数据转换为R数据框

我有一个XML文件，它由java应用程序返回以在运输问题中查找最佳路线。希望在R中使用这个输出文件。我在R中使用了“XML”包。在XML文件中有一个名为“VehicleList”的节点，如果可能的话，每个车辆的路径也是足够的。将XML数据转换为R数据框

XML文件：

<VrpVehicleRoutingSolution id="1"> 
    <id>0</id> 
    <name>A-n33-k6</name> 
    <distanceType>AIR_DISTANCE</distanceType> 
    <distanceUnitOfMeasurement>distance</distanceUnitOfMeasurement> 
    <locationList id="2"> 
    <VrpAirLocation id="3"> 
     <id>1</id> 
     <latitude>34.0</latitude> 
     <longitude>31.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="4"> 
     <id>2</id> 
     <latitude>45.0</latitude> 
     <longitude>55.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="5"> 
     <id>3</id> 
     <latitude>70.0</latitude> 
     <longitude>80.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="6"> 
     <id>4</id> 
     <latitude>81.0</latitude> 
     <longitude>70.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="7"> 
     <id>5</id> 
     <latitude>85.0</latitude> 
     <longitude>61.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="8"> 
     <id>6</id> 
     <latitude>59.0</latitude> 
     <longitude>55.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="9"> 
     <id>7</id> 
     <latitude>45.0</latitude> 
     <longitude>60.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="10"> 
     <id>8</id> 
     <latitude>50.0</latitude> 
     <longitude>64.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="11"> 
     <id>9</id> 
     <latitude>80.0</latitude> 
     <longitude>64.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="12"> 
     <id>10</id> 
     <latitude>75.0</latitude> 
     <longitude>90.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="13"> 
     <id>11</id> 
     <latitude>25.0</latitude> 
     <longitude>40.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="14"> 
     <id>12</id> 
     <latitude>9.0</latitude> 
     <longitude>66.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="15"> 
     <id>13</id> 
     <latitude>1.0</latitude> 
     <longitude>44.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="16"> 
     <id>14</id> 
     <latitude>50.0</latitude> 
     <longitude>54.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="17"> 
     <id>15</id> 
     <latitude>35.0</latitude> 
     <longitude>45.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="18"> 
     <id>16</id> 
     <latitude>71.0</latitude> 
     <longitude>84.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="19"> 
     <id>17</id> 
     <latitude>1.0</latitude> 
     <longitude>9.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="20"> 
     <id>18</id> 
     <latitude>25.0</latitude> 
     <longitude>54.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="21"> 
     <id>19</id> 
     <latitude>45.0</latitude> 
     <longitude>59.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="22"> 
     <id>20</id> 
     <latitude>45.0</latitude> 
     <longitude>71.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="23"> 
     <id>21</id> 
     <latitude>66.0</latitude> 
     <longitude>84.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="24"> 
     <id>22</id> 
     <latitude>11.0</latitude> 
     <longitude>35.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="25"> 
     <id>23</id> 
     <latitude>81.0</latitude> 
     <longitude>46.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="26"> 
     <id>24</id> 
     <latitude>85.0</latitude> 
     <longitude>10.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="27"> 
     <id>25</id> 
     <latitude>75.0</latitude> 
     <longitude>20.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="28"> 
     <id>26</id> 
     <latitude>15.0</latitude> 
     <longitude>21.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="29"> 
     <id>27</id> 
     <latitude>90.0</latitude> 
     <longitude>45.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="30"> 
     <id>28</id> 
     <latitude>15.0</latitude> 
     <longitude>0.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="31"> 
     <id>29</id> 
     <latitude>31.0</latitude> 
     <longitude>26.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="32"> 
     <id>30</id> 
     <latitude>10.0</latitude> 
     <longitude>95.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="33"> 
     <id>31</id> 
     <latitude>6.0</latitude> 
     <longitude>6.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="34"> 
     <id>32</id> 
     <latitude>51.0</latitude> 
     <longitude>5.0</longitude> 
    </VrpAirLocation> 
    <VrpAirLocation id="35"> 
     <id>33</id> 
     <latitude>26.0</latitude> 
     <longitude>36.0</longitude> 
    </VrpAirLocation> 
    </locationList> 
    <depotList id="36"> 
    <VrpDepot id="37"> 
     <id>1</id> 
     <location class="VrpAirLocation" reference="3"/> 
    </VrpDepot> 
    </depotList> 
    <vehicleList id="38"> 
    <VrpVehicle id="39"> 
     <id>0</id> 
     <capacity>100</capacity> 
     <depot reference="37"/> 
     <nextCustomer id="40"> 
     <id>33</id> 
     <location class="VrpAirLocation" reference="35"/> 
     <demand>22</demand> 
     <previousStandstill class="VrpVehicle" reference="39"/> 
     <nextCustomer id="41"> 
      <id>11</id> 
      <location class="VrpAirLocation" reference="13"/> 
      <demand>1</demand> 
      <previousStandstill class="VrpCustomer" reference="40"/> 
      <nextCustomer id="42"> 
      <id>12</id> 
      <location class="VrpAirLocation" reference="14"/> 
      <demand>21</demand> 
      <previousStandstill class="VrpCustomer" reference="41"/> 
      <nextCustomer id="43"> 
       <id>30</id> 
       <location class="VrpAirLocation" reference="32"/> 
       <demand>22</demand> 
       <previousStandstill class="VrpCustomer" reference="42"/> 
       <nextCustomer id="44"> 
       <id>18</id> 
       <location class="VrpAirLocation" reference="20"/> 
       <demand>17</demand> 
       <previousStandstill class="VrpCustomer" reference="43"/> 
       <vehicle reference="39"/> 
       </nextCustomer> 
       <vehicle reference="39"/> 
      </nextCustomer> 
      <vehicle reference="39"/> 
      </nextCustomer> 
      <vehicle reference="39"/> 
     </nextCustomer> 
     <vehicle reference="39"/> 
     </nextCustomer> 
    </VrpVehicle> 
    <VrpVehicle id="45"> 
     <id>1</id> 
     <capacity>100</capacity> 
     <depot reference="37"/> 
     <nextCustomer id="46"> 
     <id>14</id> 
     <location class="VrpAirLocation" reference="16"/> 
     <demand>25</demand> 
     <previousStandstill class="VrpVehicle" reference="45"/> 
     <nextCustomer id="47"> 
      <id>8</id> 
      <location class="VrpAirLocation" reference="10"/> 
      <demand>15</demand> 
      <previousStandstill class="VrpCustomer" reference="46"/> 
      <nextCustomer id="48"> 
      <id>19</id> 
      <location class="VrpAirLocation" reference="21"/> 
      <demand>17</demand> 
      <previousStandstill class="VrpCustomer" reference="47"/> 
      <nextCustomer id="49"> 
       <id>2</id> 
       <location class="VrpAirLocation" reference="4"/> 
       <demand>26</demand> 
       <previousStandstill class="VrpCustomer" reference="48"/> 
       <nextCustomer id="50"> 
       <id>15</id> 
       <location class="VrpAirLocation" reference="17"/> 
       <demand>16</demand> 
       <previousStandstill class="VrpCustomer" reference="49"/> 
       <vehicle reference="45"/> 
       </nextCustomer> 
       <vehicle reference="45"/> 
      </nextCustomer> 
      <vehicle reference="45"/> 
      </nextCustomer> 
      <vehicle reference="45"/> 
     </nextCustomer> 
     <vehicle reference="45"/> 
     </nextCustomer> 
    </VrpVehicle> 
    <VrpVehicle id="51"> 
     <id>2</id> 
     <capacity>100</capacity> 
     <depot reference="37"/> 
     <nextCustomer id="52"> 
     <id>13</id> 
     <location class="VrpAirLocation" reference="15"/> 
     <demand>66</demand> 
     <previousStandstill class="VrpVehicle" reference="51"/> 
     <nextCustomer id="53"> 
      <id>22</id> 
      <location class="VrpAirLocation" reference="24"/> 
      <demand>25</demand> 
      <previousStandstill class="VrpCustomer" reference="52"/> 
      <vehicle reference="51"/> 
     </nextCustomer> 
     <vehicle reference="51"/> 
     </nextCustomer> 
    </VrpVehicle> 
    <VrpVehicle id="54"> 
     <id>3</id> 
     <capacity>100</capacity> 
     <depot reference="37"/> 
     <nextCustomer id="55"> 
     <id>29</id> 
     <location class="VrpAirLocation" reference="31"/> 
     <demand>21</demand> 
     <previousStandstill class="VrpVehicle" reference="54"/> 
     <nextCustomer id="56"> 
      <id>28</id> 
      <location class="VrpAirLocation" reference="30"/> 
      <demand>11</demand> 
      <previousStandstill class="VrpCustomer" reference="55"/> 
      <nextCustomer id="57"> 
      <id>31</id> 
      <location class="VrpAirLocation" reference="33"/> 
      <demand>25</demand> 
      <previousStandstill class="VrpCustomer" reference="56"/> 
      <nextCustomer id="58"> 
       <id>17</id> 
       <location class="VrpAirLocation" reference="19"/> 
       <demand>7</demand> 
       <previousStandstill class="VrpCustomer" reference="57"/> 
       <nextCustomer id="59"> 
       <id>26</id> 
       <location class="VrpAirLocation" reference="28"/> 
       <demand>11</demand> 
       <previousStandstill class="VrpCustomer" reference="58"/> 
       <vehicle reference="54"/> 
       </nextCustomer> 
       <vehicle reference="54"/> 
      </nextCustomer> 
      <vehicle reference="54"/> 
      </nextCustomer> 
      <vehicle reference="54"/> 
     </nextCustomer> 
     <vehicle reference="54"/> 
     </nextCustomer> 
    </VrpVehicle> 
    <VrpVehicle id="60"> 
     <id>4</id> 
     <capacity>100</capacity> 
     <depot reference="37"/> 
     <nextCustomer id="61"> 
     <id>32</id> 
     <location class="VrpAirLocation" reference="34"/> 
     <demand>2</demand> 
     <previousStandstill class="VrpVehicle" reference="60"/> 
     <nextCustomer id="62"> 
      <id>24</id> 
      <location class="VrpAirLocation" reference="26"/> 
      <demand>7</demand> 
      <previousStandstill class="VrpCustomer" reference="61"/> 
      <nextCustomer id="63"> 
      <id>25</id> 
      <location class="VrpAirLocation" reference="27"/> 
      <demand>21</demand> 
      <previousStandstill class="VrpCustomer" reference="62"/> 
      <nextCustomer id="64"> 
       <id>23</id> 
       <location class="VrpAirLocation" reference="25"/> 
       <demand>16</demand> 
       <previousStandstill class="VrpCustomer" reference="63"/> 
       <nextCustomer id="65"> 
       <id>27</id> 
       <location class="VrpAirLocation" reference="29"/> 
       <demand>21</demand> 
       <previousStandstill class="VrpCustomer" reference="64"/> 
       <nextCustomer id="66"> 
        <id>5</id> 
        <location class="VrpAirLocation" reference="7"/> 
        <demand>15</demand> 
        <previousStandstill class="VrpCustomer" reference="65"/> 
        <nextCustomer id="67"> 
        <id>9</id> 
        <location class="VrpAirLocation" reference="11"/> 
        <demand>16</demand> 
        <previousStandstill class="VrpCustomer" reference="66"/> 
        <vehicle reference="60"/> 
        </nextCustomer> 
        <vehicle reference="60"/> 
       </nextCustomer> 
       <vehicle reference="60"/> 
       </nextCustomer> 
       <vehicle reference="60"/> 
      </nextCustomer> 
      <vehicle reference="60"/> 
      </nextCustomer> 
      <vehicle reference="60"/> 
     </nextCustomer> 
     <vehicle reference="60"/> 
     </nextCustomer> 
    </VrpVehicle> 
    <VrpVehicle id="68"> 
     <id>5</id> 
     <capacity>100</capacity> 
     <depot reference="37"/> 
     <nextCustomer id="69"> 
     <id>7</id> 
     <location class="VrpAirLocation" reference="9"/> 
     <demand>5</demand> 
     <previousStandstill class="VrpVehicle" reference="68"/> 
     <nextCustomer id="70"> 
      <id>20</id> 
      <location class="VrpAirLocation" reference="22"/> 
      <demand>22</demand> 
      <previousStandstill class="VrpCustomer" reference="69"/> 
      <nextCustomer id="71"> 
      <id>21</id> 
      <location class="VrpAirLocation" reference="23"/> 
      <demand>10</demand> 
      <previousStandstill class="VrpCustomer" reference="70"/> 
      <nextCustomer id="72"> 
       <id>10</id> 
       <location class="VrpAirLocation" reference="12"/> 
       <demand>17</demand> 
       <previousStandstill class="VrpCustomer" reference="71"/> 
       <nextCustomer id="73"> 
       <id>16</id> 
       <location class="VrpAirLocation" reference="18"/> 
       <demand>11</demand> 
       <previousStandstill class="VrpCustomer" reference="72"/> 
       <nextCustomer id="74"> 
        <id>3</id> 
        <location class="VrpAirLocation" reference="5"/> 
        <demand>17</demand> 
        <previousStandstill class="VrpCustomer" reference="73"/> 
        <nextCustomer id="75"> 
        <id>4</id> 
        <location class="VrpAirLocation" reference="6"/> 
        <demand>6</demand> 
        <previousStandstill class="VrpCustomer" reference="74"/> 
        <nextCustomer id="76"> 
         <id>6</id> 
         <location class="VrpAirLocation" reference="8"/> 
         <demand>7</demand> 
         <previousStandstill class="VrpCustomer" reference="75"/> 
         <vehicle reference="68"/> 
        </nextCustomer> 
        <vehicle reference="68"/> 
        </nextCustomer> 
        <vehicle reference="68"/> 
       </nextCustomer> 
       <vehicle reference="68"/> 
       </nextCustomer> 
       <vehicle reference="68"/> 
      </nextCustomer> 
      <vehicle reference="68"/> 
      </nextCustomer> 
      <vehicle reference="68"/> 
     </nextCustomer> 
     <vehicle reference="68"/> 
     </nextCustomer> 
    </VrpVehicle> 
    </vehicleList> 
    <customerList id="77"> 
    <VrpCustomer reference="49"/> 
    <VrpCustomer reference="74"/> 
    <VrpCustomer reference="75"/> 
    <VrpCustomer reference="66"/> 
    <VrpCustomer reference="76"/> 
    <VrpCustomer reference="69"/> 
    <VrpCustomer reference="47"/> 
    <VrpCustomer reference="67"/> 
    <VrpCustomer reference="72"/> 
    <VrpCustomer reference="41"/> 
    <VrpCustomer reference="42"/> 
    <VrpCustomer reference="52"/> 
    <VrpCustomer reference="46"/> 
    <VrpCustomer reference="50"/> 
    <VrpCustomer reference="73"/> 
    <VrpCustomer reference="58"/> 
    <VrpCustomer reference="44"/> 
    <VrpCustomer reference="48"/> 
    <VrpCustomer reference="70"/> 
    <VrpCustomer reference="71"/> 
    <VrpCustomer reference="53"/> 
    <VrpCustomer reference="64"/> 
    <VrpCustomer reference="62"/> 
    <VrpCustomer reference="63"/> 
    <VrpCustomer reference="59"/> 
    <VrpCustomer reference="65"/> 
    <VrpCustomer reference="56"/> 
    <VrpCustomer reference="55"/> 
    <VrpCustomer reference="43"/> 
    <VrpCustomer reference="57"/> 
    <VrpCustomer reference="61"/> 
    <VrpCustomer reference="40"/> 
    </customerList> 
    <score id="78">0hard/-743441soft</score> 
</VrpVehicleRoutingSolution>

这里是我的尝试：

library(XML) 
library(plyr) 
xmlfile <- xmlTreeParse("test.xml") 
class(xmlfile) 
topxml <- xmlRoot(xmlfile) 
topxml <- xmlSApply(topxml, 
        function(x) xmlSApply(x, xmlValue)) 
xml_df <- data.frame(t(topxml), 
        row.names=NULL)

来源

2016-12-15 Venkatesh Chintha

鉴于资源只是SO关于如何定位通过XPath和要素的非微不足道＃的问题涉及转换半多如牛毛复杂的XML到R中的矩形结构，你还寻找什么，发现不足以帮助？ – hrbrmstr

在上面的XML文档中有一个节点 - “vehicleList”，它不遵循特定的模式，而我是XML的新手。 –

你没有尝试_anything_ – hrbrmstr

试试这个，需要进行修改取决于什么是想要的。（该问题要求称为VehicleList的节点，但数据中没有这样的节点，并且在问题中未提供样本输出。）请注意，有关将数据帧转换为XML的this answer非常相似。

library(XML) 

doc <- xmlTreeParse("test.xml", useInternalNodes = TRUE) 

do.call("rbind", xpathApply(doc, "//locationList/VrpAirLocation", function(node) { 
    data.frame(locationListId = xmlAttrs(xmlParent(node))[["id"]], 
      vrpLocationId = xmlAttrs(node)[["id"]], 
      id = xmlValue(node[["id"]]), 
      latitude = xmlValue(node[["latitude"]]), 
      longitude = xmlValue(node[["longitude"]])) 
}))

给（这里只显示前几行）：

locationListId vrpLocationId id latitude longitude 
1    2    3 1  34.0  31.0 
2    2    4 2  45.0  55.0 
3    2    5 3  70.0  80.0 
4    2    6 4  81.0  70.0 
5    2    7 5  85.0  61.0 
6    2    8 6  59.0  55.0

来源

2016-12-15 13:56:59

感谢@Grothendieck的回复，这非常有帮助。有一个名为vehicleList的节点与您在解决方案中使用的locationList类似。 –

将XML数据转换为R数据框

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