{"id":50782,"date":"2022-02-10T00:00:00","date_gmt":"2022-02-10T08:00:00","guid":{"rendered":"https:\/\/griddb-linux-hte8hndjf8cka8ht.westus-01.azurewebsites.net\/%e6%9c%aa%e5%88%86%e9%a1%9e\/how-to-implement-a-decision-tree-algorithm-in-java\/"},"modified":"2025-11-14T07:55:09","modified_gmt":"2025-11-14T15:55:09","slug":"how-to-implement-a-decision-tree-algorithm-in-java","status":"publish","type":"post","link":"https:\/\/griddb.net\/ja\/%e6%9c%aa%e5%88%86%e9%a1%9e\/how-to-implement-a-decision-tree-algorithm-in-java\/","title":{"rendered":"\u6c7a\u5b9a\u6728\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306eJava\u3067\u306e\u5b9f\u88c5\u65b9\u6cd5"},"content":{"rendered":"

\u7d71\u8a08\u7684\u624b\u6cd5\u3001\u6a5f\u68b0\u5b66\u7fd2\u3001\u4eba\u5de5\u77e5\u80fd\u306e\u7d44\u307f\u5408\u308f\u305b\u306b\u3088\u308a\u3001\u591a\u304f\u306e\u5206\u91ce\u3067\u652f\u63f4\u30b7\u30b9\u30c6\u30e0\u3068\u306a\u308b\u69d8\u3005\u306a\u30c7\u30fc\u30bf\u30de\u30a4\u30cb\u30f3\u30b0\u6280\u8853\u304c\u958b\u767a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u624b\u6cd5\u306f\u3001\u69d8\u3005\u306a\u5206\u91ce\u3084\u7523\u696d\u3067\u4e0d\u53ef\u6b20\u306a\u3082\u306e\u3068\u306a\u308a\u3064\u3064\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001Java\u306b\u3088\u308b\u6c7a\u5b9a\u6728\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u5b9f\u88c5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002\u307e\u305a\u3001\u3053\u306e\u8a18\u4e8b\u3067\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001Weka J48 \u6c7a\u5b9a\u6728\u3092\u4f7f\u7528\u3057\u305f\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u5b9f\u88c5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u30e1\u30a4\u30f3\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3067\u3042\u308bGridDB\u3068\u306e\u7570\u306a\u308b\u30a4\u30f3\u30bf\u30e9\u30af\u30b7\u30e7\u30f3\u3092\u8aac\u660e\u3057\u307e\u3059\u3002\u3053\u306e\u5834\u5408\u3001\u6211\u3005\u306f\u30aa\u30ea\u30b8\u30ca\u30eb\u306e\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092GridDB\u306b\u66f8\u304d\u8fbc\u307f\u3001\u30c7\u30fc\u30bf\u3092\u4fdd\u5b58\u3057\u3001\u5f8c\u3067\u6c7a\u5b9a\u6728\u3092\u69cb\u7bc9\u3059\u308b\u305f\u3081\u306b\u305d\u308c\u3092\u53d6\u308a\u51fa\u3059\u3068\u3044\u3046\u4f7f\u3044\u65b9\u3092\u3057\u307e\u3059\u3002<\/p>\n

\u5fc5\u8981\u6761\u4ef6<\/h1>\n

\u3053\u3053\u3067\u306f\u3001\u672c\u8a18\u4e8b\u3067\u4f7f\u7528\u3059\u308b\u8981\u4ef6\u3068\u69cb\u6210\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n

Weka 3.9: weka.jar \u30d5\u30a1\u30a4\u30eb\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u3001\/usr\/share\/java\/<\/em>\u30d1\u30b9\u306b\u914d\u7f6e\u3057\u307e\u3059\u3002<\/p>\n

GridDB 4.6: \u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u5f8c\u3001GridDB \u30af\u30e9\u30b9\u30bf\u304c\u30a2\u30af\u30c6\u30a3\u30d6\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

CLASSPATH\u306bWeka\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u30d1\u30b9\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002GridDB\u306b\u3064\u3044\u3066\u3082\u540c\u69d8\u306e\u64cd\u4f5c\u3092\u884c\u3044\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u5bfe\u5fdc\u3059\u308b\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u3067\u3059\u3002<\/p>\n

\n
$ export CLASSPATH=${CLASSPATH}:\/usr\/share\/java\/weka.jar\n$ export CLASSPATH=$CLASSPATH:\/usr\/share\/java\/gridstore.jar\n<\/code><\/pre>\n<\/div>\n
\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8<\/h1>\n
\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u30a2\u30e4\u30e1\u306e\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u306b\u3057\u307e\u3057\u305f\u3002\u3053\u306e\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306f\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u3067\u3053\u3061\u3089<\/a>\u306b\u516c\u958b\u3055\u308c\u3066\u304a\u308a\u30015\u3064\u306e\u5c5e\u6027\u3092\u6301\u3064149\u306e\u30a8\u30f3\u30c8\u30ea\u3067\u69cb\u6210\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
    \n
  1. \u843c\u7247\u306e\u9577\u3055(cm): \u30a2\u30e4\u30e1\u79d1\u690d\u7269\u306e\u843c\u7247\u306e\u9577\u3055\u3092\u6e2c\u5b9a\u3057\u305f\u3082\u306e<\/li>\n
  2. \u843c\u7247\u306e\u5e45(cm): \u30a2\u30e4\u30e1\u79d1\u690d\u7269\u306e\u843c\u7247\u306e\u5e45\u3092\u6e2c\u5b9a\u3057\u305f\u3082\u306e<\/li>\n
  3. \u82b1\u5f01\u306e\u9577\u3055(cm): \u30a2\u30e4\u30e1\u79d1\u690d\u7269\u306e\u82b1\u5f01\u306e\u9577\u3055\u3092\u6e2c\u5b9a\u3057\u305f\u3082\u306e<\/li>\n
  4. \u82b1\u5f01\u306e\u5e45(cm): \u30a2\u30e4\u30e1\u79d1\u690d\u7269\u306e\u82b1\u5f01\u306e\u5e45\u3092\u6e2c\u5b9a\u3057\u305f\u3082\u306e<\/li>\n
  5. \u30af\u30e9\u30b9: \u30a2\u30e4\u30e1\u306e\u4e9c\u7a2e\u3092\u793a\u3059\u3002\u8a2d\u5b9a\u53ef\u80fd\u306a\u5024\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3002Iris Setos, Iris Versicolour, Iris Virginica.<\/li>\n<\/ol>\n
    \u4ee5\u4e0b\u306f\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306e\u629c\u7c8b\u3067\u3059\u3002<\/p>\n
    \n
    4.6,3.2,1.4,0.2,Iris-setosa\n5.3,3.7,1.5,0.2,Iris-setosa\n5.0,3.3,1.4,0.2,Iris-setosa\n7.0,3.2,4.7,1.4,Iris-versicolor\n6.4,3.2,4.5,1.5,Iris-versicolor\n<\/code><\/pre>\n<\/div>\n
    \u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306f.CSV\u30d5\u30a1\u30a4\u30eb\u306e\u5f62\u3067\u63d0\u4f9b\u3055\u308c\u3001\u305d\u308c\u3092\u8aad\u307f\u8fbc\u307f\u3001\u30d1\u30fc\u30b9\u3057\u3001\u5c06\u6765GridDB\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306b\u4fdd\u5b58\u3059\u308b\u305f\u3081\u306b\u4e00\u6642\u7684\u306b\u5909\u6570\u306b\u683c\u7d0d\u3055\u308c\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3067\u3053\u308c\u3089\u306e\u51e6\u7406\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n
    \n
    \/\/ Handlig Dataset and storage to GridDB\nFile data = new File(\"\/home\/ubuntu\/griddb\/gsSample\/iris.csv\");\nScanner sc = new Scanner(data);  \nsc.useDelimiter(\"n\");\nwhile (sc.hasNext())  \/\/returns a boolean value  \n{  \n    Row row = collection.createRow();\n\n    String line = sc.next();\n    String columns[] = line.split(\",\");\n    float slenght = Float.parseFloat(columns[0]);\n    float swidth = Float.parseFloat(columns[1]);\n    float plenght = Float.parseFloat(columns[2]);\n    float pwidth = Float.parseFloat(columns[3]);\n    String irisclass = columns[4];\n}\n<\/code><\/pre>\n<\/div>\n
    \u7d42\u4e86\u3057\u305f\u3089\u3001\u30b9\u30ad\u30e3\u30ca\u3092\u9589\u3058\u308b\u306e\u3092\u5fd8\u308c\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002<\/p>\n
    \n
    sc.close();<\/code><\/pre>\n<\/div>\n
    \u82b1\u5f01\u3068\u843c\u306e\u5bf8\u6cd5\u304b\u3089\u30a2\u30e4\u30e1\u306e\u4e9c\u7a2e\u3092\u4e88\u6e2c\u3059\u308b\u305f\u3081\u306b\u3001\u6c7a\u5b9a\u6728\u3092\u5b9f\u88c5\u3057\u307e\u3057\u305f\u3002\u4ee5\u4e0b\u3067\u306f\u3001Java\u306b\u3088\u308b\u6c7a\u5b9a\u6728\u306e\u5b9f\u88c5\u3092\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n
    Java\u306b\u3088\u308b\u6c7a\u5b9a\u6728\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u5b9f\u88c5<\/h1>\n
    \u524d\u9805\u3067\u8ff0\u3079\u305f\u3088\u3046\u306b\u3001\u3053\u306e\u8a18\u4e8b\u3067\u306fWeka\u30d1\u30c3\u30b1\u30fc\u30b8\u3067\u5229\u7528\u53ef\u80fd\u306aJ48\u6c7a\u5b9a\u6728\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u3053\u306e\u30af\u30e9\u30b9\u306f\u3001\u5208\u308a\u8fbc\u307f\u6e08\u307f\u307e\u305f\u306f\u5208\u308a\u8fbc\u307f\u306a\u3057\u306eC4.5\u6c7a\u5b9a\u6728\u3092\u751f\u6210\u3057\u307e\u3059\u3002\u3067\u306f\u3001\u305d\u306e\u5b9f\u88c5\u3092\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u307e\u305a\u3001Weka\u306b\u5fc5\u8981\u306a\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3059\u308b\u3053\u3068\u304b\u3089\u59cb\u3081\u307e\u3059\u3002<\/p>\n
    \n
    import weka.core.Instances;\nimport weka.core.converters.ConverterUtils.DataSource;\nimport weka.classifiers.trees.J48;\nimport weka.classifiers.Evaluation;\n<\/code><\/pre>\n<\/div>\n
    J48\u6c7a\u5b9a\u6728\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306b\u306f\u3001\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3068\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u30de\u30c3\u30c1\u30f3\u30b0\u3055\u305b\u308b\u305f\u3081\u306b\u5fae\u8abf\u6574\u3067\u304d\u308b\u4e00\u9023\u306e\u5c5e\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u4eca\u56de\u306e\u5834\u5408\u3001\u4ee5\u4e0b\u306e2\u3064\u3092\u8a2d\u5b9a\u3057\u307e\u3057\u305f\u3002<\/p>\n
    -C . \u679d\u5208\u308a\u306e\u4fe1\u983c\u5ea6<\/strong>\u3002\u679d\u5208\u308a\u306e\u305f\u3081\u306e\u4fe1\u983c\u6027\u95be\u5024\u3092\u8a2d\u5b9a\u3002<\/p>\n
    \u200b -M . \u6700\u5c0f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u6570<\/strong>\u3002\u8449\u3054\u3068\u306e\u6700\u5c0f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u6570\u3092\u8a2d\u5b9a\u3002<\/p>\n
    \u3053\u3053\u3067\u306f\u3001\u679d\u5208\u308a\u306e\u4fe1\u983c\u5ea6\u30920.25\u3068\u3057\u3001\u6700\u5c0f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u6570\u309230\u3068\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3067\u5b9f\u73fe\u3055\u308c\u307e\u3059\u3002<\/p>\n
    \n
    String[] options = new String[4];\noptions[0] = \"-C\";\noptions[1] = \"0.25\";\noptions[2] = \"-M\";\noptions[3] = \"30\";\n<\/code><\/pre>\n<\/div>\n
    \u6c7a\u5b9a\u6728\u304c\u5b8c\u6210\u3057\u307e\u3057\u305f\u3002\u3067\u306f\u3001\u30c7\u30fc\u30bf\u3092\u7528\u610f\u3057\u3001\u305d\u308c\u3092\u4f7f\u3063\u3066\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u69cb\u7bc9\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n
    \u30d1\u30c3\u30b1\u30fc\u30b8\u306e\u30a4\u30f3\u30dd\u30fc\u30c8<\/h1>\n
    java.util\u30d1\u30c3\u30b1\u30fc\u30b8\u306e\u3055\u307e\u3056\u307e\u306a\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002ArrayList\u3068List\u306f\u30c7\u30fc\u30bf\u3092\u6574\u7406\u3059\u308b\u305f\u3081\u306b\u4f7f\u3044\u307e\u3059\u3002Properties\u30af\u30e9\u30b9\u306f\u3001GridDB\u30b9\u30c8\u30a2\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u30af\u30e9\u30b9\u30bf\u63a5\u7d9a\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u6e21\u3059\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u6700\u5f8c\u306b\u3001Random\u30af\u30e9\u30b9\u306f\u3001\u6c7a\u5b9a\u6728\u306e\u69cb\u7bc9\u306b\u304a\u3051\u308b\u4ea4\u5dee\u691c\u8a3c\u30d5\u30a7\u30fc\u30ba\u3067\u3001\u30b7\u30fc\u30c9\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u30e9\u30f3\u30c0\u30e0\u5316\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n
    \n
    import java.util.ArrayList;\nimport java.util.List;\nimport java.util.Properties;\nimport java.util.Random;\n<\/code><\/pre>\n<\/div>\n
    GridDB\u3068\u63a5\u7d9a\u3057\u3001\u5bfe\u8a71\u3059\u308b\u305f\u3081\u306b\u3001\u3055\u307e\u3056\u307e\u306a\u30d1\u30c3\u30b1\u30fc\u30b8\u304c\u30a4\u30f3\u30dd\u30fc\u30c8\u3055\u308c\u307e\u3059\u3002<\/p>\n
    \n
    import com.toshiba.mwcloud.gs.Collection;\nimport com.toshiba.mwcloud.gs.ColumnInfo;\nimport com.toshiba.mwcloud.gs.Container;\nimport com.toshiba.mwcloud.gs.ContainerInfo;\nimport com.toshiba.mwcloud.gs.GSType;\nimport com.toshiba.mwcloud.gs.GridStore;\nimport com.toshiba.mwcloud.gs.GridStoreFactory;\nimport com.toshiba.mwcloud.gs.Query;\nimport com.toshiba.mwcloud.gs.Row;\nimport com.toshiba.mwcloud.gs.RowSet;\n<\/code><\/pre>\n<\/div>\n
    \u6700\u5f8c\u306b\u3001\u5143\u306e\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u542b\u3080\u30d5\u30a1\u30a4\u30eb\u3092\u64cd\u4f5c\u3059\u308b\u305f\u3081\u306e\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002<\/p>\n
    \n
    import java.io.IOException;\nimport java.util.Scanner;\nimport java.io.File;\nimport java.io.BufferedReader;\nimport java.io.FileReader;<\/code><\/pre>\n<\/div>\n
    GridDB\u306b\u30c7\u30fc\u30bf\u3092\u66f8\u304d\u8fbc\u3080<\/h1>\n
    GridDB\u306b\u30c7\u30fc\u30bf\u3092\u66f8\u304d\u8fbc\u3080\u305f\u3081\u306b\u3001\u307e\u305a\u3001\u63a5\u7d9a\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u76ee\u7684\u306e\u30af\u30e9\u30b9\u30bf\u306b\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u540c\u69d8\u306b\u3001GridStore\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3057\u3001\u30b3\u30f3\u30c6\u30ca\u540dcontainerName<\/strong>\u3067\u53c2\u7167\u3055\u308c\u308b\u30b3\u30f3\u30c6\u30ca\u3092\u4fdd\u6301\u3057\u307e\u3059\u3002<\/p>\n
    \n
    Properties prop = new Properties();\nprop.setProperty(\"notificationAddress\", \"239.0.0.1\");\nprop.setProperty(\"notificationPort\", \"31999\");\nprop.setProperty(\"clusterName\", \"cluster\");\nprop.setProperty(\"database\", \"public\");\nprop.setProperty(\"user\", \"admin\");\nprop.setProperty(\"password\", \"admin\");\n\nGridStore store = GridStoreFactory.getInstance().getGridStore(prop);\nstore.getContainer(\"newContainer\");\nString containerName = \"last\";\n<\/code><\/pre>\n<\/div>\n
    \u3053\u308c\u3067\u30b9\u30c8\u30a2\u3068\u30b3\u30f3\u30c6\u30ca\u306e\u4f5c\u6210\u306b\u6210\u529f\u3057\u305f\u306e\u3067\u3001\u30b3\u30f3\u30c6\u30ca\u60c5\u5831\u3092\u8a2d\u5b9a\u3057\u3001\u30ab\u30e9\u30e0\u306e\u30ea\u30b9\u30c8\u3068\u305d\u308c\u306b\u5bfe\u5fdc\u3059\u308b\u30c7\u30fc\u30bf\u578b\u3092\u8a2d\u5b9a\u3057\u3066\u3001\u30b3\u30f3\u30c6\u30ca\u30b9\u30ad\u30fc\u30de\u306e\u5b9a\u7fa9\u3092\u958b\u59cb\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
    \n
    \/\/ Define ontainer schema and columns\nContainerInfo containerInfo = new ContainerInfo();\nList<columninfo> columnList = new ArrayList<\/columninfo><columninfo>();\ncolumnList.add(new ColumnInfo(\"key\", GSType.INTEGER));\ncolumnList.add(new ColumnInfo(\"slenght\", GSType.FLOAT));\ncolumnList.add(new ColumnInfo(\"swidth\", GSType.FLOAT));\ncolumnList.add(new ColumnInfo(\"plenght\", GSType.FLOAT));\ncolumnList.add(new ColumnInfo(\"pwidth\", GSType.FLOAT));\ncolumnList.add(new ColumnInfo(\"irisclass\", GSType.STRING));\n\ncontainerInfo.setColumnInfoList(columnList);\ncontainerInfo.setRowKeyAssigned(true);\n<\/code><\/pre>\n<\/div>\n
    GridDB\u306b\u306f\u30012\u7a2e\u985e\u306e\u30b3\u30f3\u30c6\u30ca\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u4eca\u56de\u306f\u3001\u4e00\u822c\u7684\u306a\u30c7\u30fc\u30bf\u3092\u7ba1\u7406\u3059\u308b\u305f\u3081\u306eCollection<\/strong>\u578b\u3092\u9078\u629e\u3057\u307e\u3059\u3002\u3053\u306e\u76ee\u7684\u306e\u305f\u3081\u306b\u3001\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u4f5c\u6210\u3057\u3001\u30c7\u30fc\u30bf\u3092\u6574\u7406\u3059\u308b\u305f\u3081\u306e\u884c\u306e\u30ea\u30b9\u30c8\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u5143\u306e CSV \u30d5\u30a1\u30a4\u30eb\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306b\u3001\u5404\u53cd\u5fa9\u51e6\u7406\u3067\u30c7\u30fc\u30bf\u884c\u3092\u4fdd\u6301\u3059\u308b Row \u30af\u30e9\u30b9\u3092\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3059\u308b\u4e88\u5b9a\u3067\u3059\u3002<\/p>\n
    \n
    Collection<Void, Row> collection = store.putCollection(containerName, containerInfo, false);\nList<row> rowList = new ArrayList<row>();\nRow row = collection.createRow();\n<\/code><\/pre>\n<\/div>\n
    GridDB\u306b\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u3059\u308b<\/h1>\n
    \u3053\u306e\u3068\u304d\u3001\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u304b\u3089\u5f97\u305f\u5024\u3092\u4e00\u6642\u7684\u306b\u683c\u7d0d\u3059\u308b\u305f\u3081\u306e\u5909\u6570\u3092\u547c\u3073\u51fa\u3057\u3001\u5404\u884c\u306b\u633f\u5165\u3057\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u524d\u7bc0\u3067\u5b9a\u7fa9\u3057\u305f\u884c\u30ea\u30b9\u30c8\u306b\u5404\u884c\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n
    \n
    row.setInteger(0,key);\nrow.setFloat(1,slenght );\nrow.setFloat(2, swidth);\nrow.setFloat(3, plenght);\nrow.setFloat(4, pwidth);\nrow.setString(5, irisclass);\nrowList.add(row);\n<\/code><\/pre>\n<\/div>\n
    GridDB\u306b\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u3059\u308b\u305f\u3081\u306b\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u884c\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n
    \n
    collection.put(rowList);<\/code><\/pre>\n<\/div>\n
    GridDB\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b<\/h1>\n
    GridDB\u306b\u683c\u7d0d\u3057\u305f\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306b\u3001TQL\u30af\u30a8\u30ea\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002\u3053\u306e\u4f8b\u3067\u306f\u3001\u30b3\u30f3\u30c6\u30ca\u5185\u306e\u3059\u3079\u3066\u306e\u30c7\u30fc\u30bf\u3092\u9078\u629e\u3057\u307e\u3059\u3002<\/p>\n
    \n
    Query<row> query = container.query(\"SELECT * \");\nRowSet<row> rs = query.fetch();<\/code><\/pre>\n<\/div>\n
    \u30c7\u30fc\u30bf\u3092\u53ef\u8996\u5316\u3057\u305f\u3044\u5834\u5408\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n
    \n
    while ( rs.hasNext() ) {\n    Row row = rs.next();\n    float slenght = row.getFloat(0);\n    float swidth = row.getFloat(1);\n    float plenght = row.getFloat(2);\n    float pwidth = row.getFloat(3);\n    String irisclass = row.getString(4);\n    System.out.println(\" slenght=\" + slenght + \", swidth=\" + swidth + \", plenght=\" + plenght +\", pwidth=\" + pwidth+\", irisclass=\" + irisclass);\n}\n<\/code><\/pre>\n<\/div>\n
    \u6c7a\u5b9a\u6728\u306e\u69cb\u7bc9<\/h1>\n
    GridDB\u306b\u30c7\u30fc\u30bf\u304c\u683c\u7d0d\u3055\u308c\u305f\u306e\u3067\u3001\u3053\u306e\u30c7\u30fc\u30bf\u3092\u4f7f\u3063\u3066\u6c7a\u5b9a\u6728\u3092\u69cb\u7bc9\u3059\u308b\u6e96\u5099\u304c\u3067\u304d\u307e\u3057\u305f\u3002\u5206\u985e\u6728\u3092\u69cb\u7bc9\u3059\u308b Weka \u95a2\u6570\u306f\u3001\u30c7\u30fc\u30bf\u306e Instance \u3092\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u53d7\u3051\u53d6\u308b\u306e\u3067\u3001Weka \u95a2\u6570\u306b\u9069\u3057\u305f\u30c7\u30fc\u30bf\u306b\u3059\u308b\u305f\u3081\u306b\u3001\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u8a18\u8ff0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
    \n
    BufferedReader bufferedReader= new BufferedReader(new FileReader(res));\nInstances datasetInstances= new Instances(bufferedReader);\n<\/code><\/pre>\n<\/div>\n
    \u3053\u306e\u30ec\u30d9\u30eb\u3067\u306f\u3001\u5358\u7d14\u306b\u5206\u985e\u5668\u306e\u69cb\u7bc9\u306b\u9032\u307f\u307e\u3059\u3002<\/p>\n
    \n
    mytree.buildClassifier(datasetInstances);<\/code><\/pre>\n<\/div>\n
    \u6700\u5f8c\u306b\u3001\u69cb\u7bc9\u3057\u305f\u5206\u985e\u5668\u30c4\u30ea\u30fc\u306e\u8a55\u4fa1\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n
    \n
    Evaluation eval = new Evaluation(datasetInstances);  eval.crossValidateModel(mytree, datasetInstances, 10, new Random(1));<\/code><\/pre>\n<\/div>\n
    \u30b3\u30fc\u30c9\u306e\u6700\u5f8c\u306e\u884c\u3067\u3001\u30c7\u30fc\u30bf\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u5bfe\u3057\u3066\u30af\u30ed\u30b9\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u884c\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u304c\u7570\u306a\u308b\u65b9\u6cd5\u3067\u5206\u5272\u3055\u308c\u3001\u504f\u308a\u306e\u306a\u3044\u7d50\u679c\u304c\u5f97\u3089\u308c\u308b\u3053\u3068\u304c\u4fdd\u8a3c\u3055\u308c\u307e\u3059\uff08\u7279\u306b\u3001\u9650\u3089\u308c\u305f\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3067\u8a08\u7b97\u3059\u308b\u5834\u5408\uff09\u3002<\/p>\n
    \u6700\u5f8c\u306b\u3001\u8a55\u4fa1\u7d50\u679c\u306e\u30b5\u30de\u30ea\u30fc\u3092\u8868\u793a\u3057\u307e\u3059\u3002<\/p>\n
    \n
    System.out.println(eval.toSummaryString(\"n ****** J48 *****n\", true));<\/code><\/pre>\n<\/div>\n
    \u30b3\u30fc\u30c9\u306e\u30b3\u30f3\u30d1\u30a4\u30eb\u3068\u5b9f\u884c<\/h1>\n
    \u79c1\u305f\u3061\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u306f\u3001.java \u30d5\u30a1\u30a4\u30eb\u304c gsSample \u30c7\u30d5\u30a9\u30eb\u30c8\u30d5\u30a9\u30eb\u30c0\u306e\u30ec\u30d9\u30eb\u306b\u3042\u308a\u3001\u3053\u306e\u8a18\u4e8b\u3067\u8aac\u660e\u3055\u308c\u3066\u3044\u308b\u30b3\u30fc\u30c9\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002GridDB \u30d5\u30a9\u30eb\u30c0\u306b\u79fb\u52d5\u3057\u3001\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u3066\u3001\u30b3\u30fc\u30c9\u3092\u30b3\u30f3\u30d1\u30a4\u30eb\u30fb\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n
    \n
    ~\/griddb$ javac gsSample\/Select.java\n~\/griddb$ java gsSample\/Select.java<\/code><\/pre>\n<\/div>\n
    \u3053\u306e\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3059\u308b\u969b\u3001\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u306b\u8ffd\u52a0\u306e\u30af\u30e9\u30b9\u30bf\u30fc\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u306f\u5fc5\u8981\u306a\u3044\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n
    \u7d50\u8ad6<\/h1>\n
    \u4ee5\u4e0b\u306f\u3001\u524d\u7bc0\u3067\u5370\u5237\u3057\u305f\u8a55\u4fa1\u6982\u8981\u306e\u629c\u7c8b\u3067\u3059\u3002<\/p>\n
    \n
    ---Registering Weka Editors---\nTrying to add database driver (JDBC): jdbc.idbDriver - Error, not in CLASSPATH?\n\n ****** J48 *****\n\nCorrectly Classified Instances         141               94.6309 %\nIncorrectly Classified Instances         8                5.3691 %\nKappa statistic                          0.9195\nK&B Relative Info Score              13340.283  %\nK&B Information Score                  211.4385 bits      1.4191 bits\/instance\nClass complexity | order 0             236.1698 bits      1.585  bits\/instance\nClass complexity | scheme             2179.3992 bits     14.6268 bits\/instance\nComplexity improvement     (Sf)      -1943.2293 bits    -13.0418 bits\/instance\nMean absolute error                      0.0578\nRoot mean squared error                  0.1831\nRelative absolute error                 13.0031 %\nRoot relative squared error             38.8358 %\nTotal Number of Instances              149<\/code><\/pre>\n<\/div>\n
    \u3053\u306e\u3088\u3046\u306b\u3001\u6c7a\u5b9a\u6728\u306f\u30a2\u30e4\u30e1\u3092\u30af\u30e9\u30b9\u5206\u3051\u3059\u308b\u969b\u306b\u300194.6%<\/strong>\u306e\u7cbe\u5ea6\u3092\u9054\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u305f\u306e\u3067\u3059\u3002\u7d50\u679c\u3068\u305d\u306e\u89e3\u91c8\u306b\u3064\u3044\u3066\u306e\u8a73\u7d30\u306f\u3001Weka J48\u306e\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n
    TQL \u30af\u30a8\u30ea\u3001\u30b3\u30f3\u30c6\u30ca\u3001GridDB \u30b9\u30c8\u30a2\u3092\u9589\u3058\u308b\u306e\u3092\u5fd8\u308c\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002<\/p>\n
    \n
    query.close();\ncontainer.close();\nstore.close();\n<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
    \u7d71\u8a08\u7684\u624b\u6cd5\u3001\u6a5f\u68b0\u5b66\u7fd2\u3001\u4eba\u5de5\u77e5\u80fd\u306e\u7d44\u307f\u5408\u308f\u305b\u306b\u3088\u308a\u3001\u591a\u304f\u306e\u5206\u91ce\u3067\u652f\u63f4\u30b7\u30b9\u30c6\u30e0\u3068\u306a\u308b\u69d8\u3005\u306a\u30c7\u30fc\u30bf\u30de\u30a4\u30cb\u30f3\u30b0\u6280\u8853\u304c\u958b\u767a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u624b\u6cd5\u306f\u3001\u69d8\u3005\u306a\u5206\u91ce\u3084\u7523\u696d\u3067\u4e0d\u53ef\u6b20\u306a\u3082\u306e\u3068\u306a\u308a\u3064\u3064\u3042\u308a\u307e\u3059\u3002 \u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001Java\u306b\u3088 […]<\/p>\n","protected":false},"author":41,"featured_media":49361,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1005],"tags":[],"class_list":["post-50782","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-1005"],"acf":[],"yoast_head":"\n\u6c7a\u5b9a\u6728\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306eJava\u3067\u306e\u5b9f\u88c5\u65b9\u6cd5 | GridDB: Open Source Time Series Database for IoT<\/title>\n<meta name=\"description\" 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