{"id":50784,"date":"2022-03-15T00:00:00","date_gmt":"2022-03-15T07:00:00","guid":{"rendered":"https:\/\/griddb-linux-hte8hndjf8cka8ht.westus-01.azurewebsites.net\/%e6%9c%aa%e5%88%86%e9%a1%9e\/how-to-implement-a-random-forest-algorithm-in-java\/"},"modified":"2025-11-14T07:55:11","modified_gmt":"2025-11-14T15:55:11","slug":"how-to-implement-a-random-forest-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-random-forest-algorithm-in-java\/","title":{"rendered":"Java\u306b\u3088\u308b\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u306e\u5b9f\u88c5\u65b9\u6cd5"},"content":{"rendered":"<p>\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u306f\u3001\u5206\u985e\u306a\u3069\u306b\u7528\u3044\u3089\u308c\u308b\u6a5f\u68b0\u5b66\u7fd2\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u4e00\u3064\u3067\u3059\u3002\u672c\u30d6\u30ed\u30b0\u3067\u306f\u3001\u30a2\u30e4\u30e1\u79d1\u690d\u7269\u306e\u30af\u30e9\u30b9\u3092\u4e88\u6e2c\u3059\u308b\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306eJava\u306b\u3088\u308b\u5b9f\u88c5\u3092\u8aac\u660e\u3057\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u306b\u307e\u305a\u306f\u8981\u4ef6\u5b9a\u7fa9\u3092\u884c\u3044\u3001\u5fc5\u8981\u306a\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002\u6b21\u306b\u3001\u30a2\u30a4\u30ea\u30b9\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u63d0\u793a\u3057\u3001Weka \u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u7528\u3044\u3066\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u5b9f\u88c5\u3057\u307e\u3059\u3002\u30d5\u30a1\u30a4\u30eb\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3057\u3001GridDB\u306b\u683c\u7d0d\u3057\u307e\u3059\u3002\u305d\u3057\u3066\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3057\u3001\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002\u6700\u5f8c\u306b\u3001\u305d\u306e\u7d50\u679c\u306b\u3064\u3044\u3066\u8003\u5bdf\u3057\u307e\u3059\u3002<\/p>\n<h2>\u5fc5\u8981\u6761\u4ef6<\/h2>\n<p>\u4ee5\u4e0b\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u7d39\u4ecb\u3059\u308b\u30b3\u30fc\u30c9\u306f\u3001\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306e\u4fdd\u5b58\u3068\u53d6\u5f97\u306bGridDB\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001GridDB\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u3001\u30ce\u30fc\u30c9\u3092\u4f5c\u6210\u3057\u3001\u30af\u30e9\u30b9\u30bf\u306b\u53c2\u52a0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002Ubuntu 18.04\u3067GridDB\u3092\u5229\u7528\u3059\u308b\u5834\u5408\u306f\u3001\u74b0\u5883\u5909\u6570\u306e\u66f4\u65b0\u3092\u5fd8\u308c\u306a\u3044\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<div class=\"clipboard\">\n<pre><code class=\"language-sh\">export GS_HOME=$PWD\nexport GS_LOG=$PWD\/log\nexport PATH=${PATH}:$GS_HOME\/bin<\/code><\/pre>\n<\/div>\n<p>\u540c\u3058\u3053\u3068\u3092<em>gridstore.jar<\/em>\u30d1\u30c3\u30b1\u30fc\u30b8\u306b\u5bfe\u3057\u3066\u884c\u3044\u307e\u3059\u3002<\/p>\n<div class=\"clipboard\">\n<pre><code class=\"language-sh\">export CLASSPATH=$CLASSPATH:\/usr\/share\/java\/gridstore.jar <\/code><\/pre>\n<\/div>\n<p>\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306b\u3064\u3044\u3066\u306f\u3001Weka\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u3001\u305d\u306e\u5834\u6240\u3092\u793a\u3059\u3088\u3046\u306bJava\u306e\u74b0\u5883\u5909\u6570\u3092\u66f4\u65b0\u3057\u307e\u3059\u3002<\/p>\n<div class=\"clipboard\">\n<pre><code class=\"language-sh\">export CLASSPATH=${CLASSPATH}:\/usr\/share\/java\/weka.jar<\/code><\/pre>\n<\/div>\n<p>Java\u30b3\u30fc\u30c9\u306e\u30ec\u30d9\u30eb\u3067\u306f\u3001GridDB\u30af\u30e9\u30b9\u30bf\u306b\u63a5\u7d9a\u3057\u3001GridDB\u30b9\u30c8\u30a2\u3068\u30b3\u30f3\u30c6\u30ca\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u30b3\u30f3\u30c6\u30ca\u30b9\u30ad\u30fc\u30de\u3001\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3001\u30ab\u30e9\u30e0\u3092\u5b9a\u7fa9\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306e\u30b3\u30fc\u30c9\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n<div class=\"clipboard\">\n<pre><code class=\"language-java\">            \/\/ Manage connection to GridDB\n            Properties properties = new Properties();\n            properties.setProperty(\"notificationAddress\", \"239.0.0.1\");\n            properties.setProperty(\"notificationPort\", \"31999\");\n            properties.setProperty(\"clusterName\", \"cluster\");\n            properties.setProperty(\"database\", \"public\");\n            properties.setProperty(\"user\", \"admin\");\n            properties.setProperty(\"password\", \"admin\");\n\n            \/\/Get Store and Container\n            GridStore store = GridStoreFactory.getInstance().getGridStore(properties);\n            store.getContainer(\"newContainer\");\n \n            String containerName = \"mContainer\";\n       \n            \/\/ Define container schema and columns\n            ContainerInfo containerInfo = new ContainerInfo();\n            List&lt;columninfo> columnList = new ArrayList();\n            columnList.add(new ColumnInfo(\"key\", GSType.INTEGER));\n            columnList.add(new ColumnInfo(\"slenght\", GSType.FLOAT));\n            columnList.add(new ColumnInfo(\"swidth\", GSType.FLOAT));\n            columnList.add(new ColumnInfo(\"plenght\", GSType.FLOAT));\n            columnList.add(new ColumnInfo(\"pwidth\", GSType.FLOAT));\n            columnList.add(new ColumnInfo(\"irisclass\", GSType.STRING));\n \n            containerInfo.setColumnInfoList(columnList);\n            containerInfo.setRowKeyAssigned(true);\n            Collection&lt;Void, Row> collection = store.putCollection(containerName, containerInfo, false);\n            List&lt;row> rowList = new ArrayList();<\/code><\/pre>\n<\/div>\n<p>\u3053\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u4e3b\u306b4\u3064\u306e\u30d1\u30c3\u30b1\u30fc\u30b8\u306e\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<ul>\n<li><code>java.util<\/code>: ArrayList\u3001List\u3001Random\u3001Scanner \u306a\u3069\u306e\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30af\u30e9\u30b9\u304c\u542b\u307e\u308c\u308b\u3002<\/li>\n<li><code>java.io<\/code>: \u30d5\u30a1\u30a4\u30eb\u304b\u3089\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u8aad\u307f\u8fbc\u3080\u305f\u3081\u306e\u5165\u51fa\u529b\u64cd\u4f5c\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<li><code>com.toshiba.mwcloud.gs<\/code>: GridDB \u3068\u306e\u30c7\u30fc\u30bf\u30a4\u30f3\u30bf\u30e9\u30af\u30b7\u30e7\u30f3\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002<\/li>\n<li><code>weka.classifier.trees<\/code>: \u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u5b9f\u88c5\u3059\u308b\u305f\u3081\u306e\u30af\u30e9\u30b9\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0b\u306f\u3001\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3059\u308b\u30b3\u30fc\u30c9\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u30af\u30e9\u30b9\u306f\u3001\u4ee5\u4e0b\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u69d8\u3005\u306a\u5834\u9762\u3067\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<div class=\"clipboard\">\n<pre><code class=\"language-java\">\/\/ ---------- Java Util ---------\nimport java.util.ArrayList;\nimport java.util.List;\nimport java.util.Properties;\nimport java.util.Random;\nimport java.util.Scanner;\n \n\/\/ ---------- Java IO ---------\nimport java.io.IOException;\nimport java.io.File;\nimport java.io.BufferedReader;\nimport java.io.FileReader;\n \n\/\/ ---------- GridDB ---------\nimport 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 \n\/\/----------- Weka ---------\nimport weka.core.Instances;\nimport weka.core.converters.ConverterUtils.DataSource;\nimport weka.classifiers.trees.RandomForest;\nimport weka.classifiers.Evaluation;\n<\/code><\/pre>\n<\/div>\n<h2>\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8<\/h2>\n<p>\u672c\u8a18\u4e8b\u3067\u4f7f\u7528\u3059\u308b\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306f\u3001Weka\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u6642\u306b\u63d0\u4f9b\u3055\u308c\u308b\u30c7\u30d5\u30a9\u30eb\u30c8\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u304b\u3089\u53d6\u5f97\u3057\u305fIris\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3067\u3059\u3002\u3053\u306e\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306b\u306f\u3001\u30a2\u30a4\u30ea\u30b9\u3068\u3044\u3046\u690d\u7269\u306e\u30b5\u30f3\u30d7\u30eb\u304b\u3089\u53ce\u96c6\u3057\u305f150\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u30c7\u30fc\u30bf\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306b\u306f\u3001\u843c\u306e\u9577\u3055\u3001\u843c\u306e\u5e45\u3001\u82b1\u5f01\u306e\u9577\u3055\u3001\u82b1\u5f01\u306e\u5e45\u3001\u690d\u7269\u306e\u30af\u30e9\u30b9\uff08Iris Setosa, Iris Versicolour, Iris Virginica\uff09\u306e5\u3064\u306e\u5c5e\u6027\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u5404\u5c5e\u6027\u306f\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306e\u5404\u5217\u306b\u305d\u308c\u305e\u308c\u5bfe\u5fdc\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u305d\u306e\u629c\u7c8b\u3067\u3059\u3002<\/p>\n<div class=\"clipboard\">\n<pre><code class=\"language-sh\">5.1,2.5,3.0,1.1,Iris-versicolor\n5.7,2.8,4.1,1.3,Iris-versicolor\n6.3,3.3,6.0,2.5,Iris-virginica\n5.8,2.7,5.1,1.9,Iris-virginica\n7.1,3.0,5.9,2.1,Iris-virginica<\/code><\/pre>\n<\/div>\n<p>\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u69cb\u7bc9\u3059\u308b\u524d\u306b\u3001\u307e\u305aCSV\u30d5\u30a1\u30a4\u30eb\u304b\u3089\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u53d6\u5f97\u3057\u3001GridDB\u306b\u66f8\u304d\u8fbc\u3080\u3053\u3068\u304b\u3089\u59cb\u3081\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u307e\u305a\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u304c\u683c\u7d0d\u3055\u308c\u305fCSV\u30d5\u30a1\u30a4\u30eb\u3092\u30aa\u30fc\u30d7\u30f3\u3057\u307e\u3059\u3002\u305d\u3057\u3066\u3001Scanner \u3092\u4f7f\u3063\u3066\u30d5\u30a1\u30a4\u30eb\u3092\u7e70\u308a\u8fd4\u3057\u8aad\u307f\u3001\u5185\u5bb9\u3092\u62bd\u51fa\u3057\u307e\u3059\u3002\u30d5\u30a1\u30a4\u30eb\u306e\u533a\u5207\u308a\u8a18\u53f7\u306f\u3001\u6539\u884c\u306f <code>n<\/code> \u3001\u30ab\u30e9\u30e0\u306f <code>,<\/code> \u3067\u3059\u3002<\/p>\n<p>while\u30eb\u30fc\u30d7\u306e\u5404\u53cd\u5fa9\u3067\u3001\u30c7\u30fc\u30bf\u3092\u6587\u5b57\u5217\u306e\u914d\u5217\u306b\u683c\u7d0d\u3057\u3001\u305d\u308c\u3092\u5bfe\u5fdc\u3059\u308b\u30c7\u30fc\u30bf\u578b\u306b\u30ad\u30e3\u30b9\u30c8\u3057\u3066\u5c02\u7528\u306e\u5909\u6570\u306b\u683c\u7d0d\u3057\u307e\u3059\u3002<\/p>\n<div class=\"clipboard\">\n<pre><code class=\"language-java\">            \/\/ Handling Dataset and storage to GridDB\n            File data = new File(\"\/home\/ubuntu\/griddb\/gsSample\/iris.csv\");\n            Scanner sc = new Scanner(data);\n            sc.useDelimiter(\"n\");\n            while (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<p>\u5f8c\u307b\u3069\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u304b\u3089\u5f97\u3089\u308c\u305f\u30c7\u30fc\u30bf\u3092GridDB\u306b\u66f8\u304d\u8fbc\u307f\u307e\u3059\u3002<\/p>\n<p>\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u9069\u7528\u3057\u3001\u30a2\u30e4\u30e1\u306e\u82b1\u306e\u843c\u7247\u3068\u82b1\u5f01\u306e\u5bf8\u6cd5\u304b\u3089\u30a2\u30e4\u30e1\u306e\u4e9c\u7a2e\u3092\u4e88\u6e2c\u3057\u307e\u3059\u3002\u305d\u306e\u5b9f\u88c5\u306b\u3064\u3044\u3066\u306f\u3001\u6b21\u306e\u30bb\u30c3\u30b7\u30e7\u30f3\u3067\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<h2>\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306eJava\u306b\u3088\u308b\u5b9f\u88c5<\/h2>\n<p>\u30a2\u30a4\u30ea\u30b9\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306b\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u7528\u3044\u308b\u3053\u3068\u3067\u3001<a href=\"https:\/\/griddb.net\/ja\/blog\/how-to-implement-a-decision-tree-algorithm-in-java\/\">\u6c7a\u5b9a\u6728<\/a>\u306b\u6bd4\u3079\u3066\u30a2\u30a4\u30ea\u30b9\u4e9c\u7a2e\u306e\u4e88\u6e2c\u7cbe\u5ea6\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u3092\u76ee\u7684\u3068\u3057\u3066\u3044\u307e\u3059\u3002\u5b9f\u969b\u3001\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306f\u3001\u3088\u308a\u8907\u96d1\u306a\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u4f7f\u7528\u3057\u3066\u4e88\u6e2c\u3092\u751f\u6210\u3059\u308b\u305f\u3081\u3001\u6c7a\u5b9a\u6728\u306e\u6539\u826f\u7248\u3068\u3057\u3066\u7d39\u4ecb\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u306f\u3001\u305d\u306e\u540d\u524d\u304c\u793a\u3059\u3088\u3046\u306b\u3001\u3088\u308a\u4ee3\u8868\u7684\u3067\u3042\u308b\u3088\u3046\u306b\u3001\u7d50\u679c\u3092\u69cb\u7bc9\u3059\u308b\u305f\u3081\u306b\u8907\u6570\u306e\u6c7a\u5b9a\u6728\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u3053\u306e2\u3064\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u9055\u3044\u306f\u3001\u6c7a\u5b9a\u6728\u304c\u8caa\u6b32\u6cd5\u3092\u7528\u3044\u3066\u5404\u30ce\u30fc\u30c9\u3067\u6c7a\u5b9a\u3092\u4e0b\u3059\u306e\u306b\u5bfe\u3057\u3001\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u306f\u5165\u529b\u30c7\u30fc\u30bf\u304b\u3089\u7121\u4f5c\u70ba\u306e\u90e8\u5206\u96c6\u5408\u3092\u9078\u3093\u3067\u6c7a\u5b9a\u3092\u4e0b\u3059\u70b9\u3067\u3059\u3002\u3053\u306e\u9055\u3044\u304c\u3001\u5b9f\u969b\u306b\u30a2\u30a4\u30ea\u30b9\u306e\u4e9c\u7a2e\u3092\u4e88\u6e2c\u3059\u308b\u7cbe\u5ea6\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u306b\u306a\u308b\u3053\u3068\u3092\u89b3\u5bdf\u3057\u307e\u3059\u3002\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u5b9f\u88c5\u3059\u308b\u305f\u3081\u306b\u3001\u6211\u3005\u306fWeka\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306f <code>weka.classifiers.trees<\/code> \u30d1\u30c3\u30b1\u30fc\u30b8\u306b\u3042\u308a\u3001\u4ed6\u306e\u8a18\u4e8b\u3067\u7d39\u4ecb\u3057\u305fJ48\u6c7a\u5b9a\u6728\u306e\u3088\u3046\u306a\u4ed6\u306e\u5206\u985e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3082\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>GridDB\u3078\u306e\u30c7\u30fc\u30bf\u66f8\u304d\u8fbc\u307f<\/h2>\n<p>\u3053\u308c\u307e\u3067\u306e\u7bc0\u3092\u3088\u304f\u898b\u3066\u307f\u308b\u3068\u3001\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u304b\u3089\u53d6\u5f97\u3057\u305f\u30c7\u30fc\u30bf\u3092GridDB\u306b\u66f8\u304d\u8fbc\u3080\u305f\u3081\u306eGridDB\u30c7\u30fc\u30bf\u578b\u3068\u3057\u3066\u3001<code>Row<\/code>\u3068<code>List&lt;Row&gt;<\/code>\u3092\u5b9a\u7fa9\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3092\u5b9f\u73fe\u3059\u308b\u306e\u304c\u3001\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3067\u3059\u3002<\/p>\n<div class=\"clipboard\">\n<pre><code class=\"language-java\">row.setInteger(0,i);\nrow.setFloat(1,slenght );\nrow.setFloat(2, swidth);\nrow.setFloat(3, plenght);\nrow.setFloat(4, pwidth);\nrow.setString(5, irisclass);\n \nrowList.add(row);\n<\/code><\/pre>\n<\/div>\n<h2>GridDB\u306b\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u3059\u308b<\/h2>\n<p>GridDB\u3078\u306e\u30c7\u30fc\u30bf\u306e\u683c\u7d0d\u306f\u3001\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306e\u30ab\u30e9\u30e0\u3068GridDB\u3067\u5b9a\u7fa9\u3055\u308c\u305f\u30b3\u30f3\u30c6\u30ca\u30b9\u30ad\u30fc\u30de\u306e\u5bfe\u5fdc\u4ed8\u3051\u306b\u3088\u308a\u5b9f\u73fe\u3055\u308c\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u601d\u3044\u51fa\u3059\u3068\u3001\u30ab\u30e9\u30e0\u304c\u76f4\u63a5\u30de\u30c3\u30d4\u30f3\u30b0\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u307e\u305a\u3001\u6574\u6570\u578b\u306e\u30ad\u30fc\u30ab\u30e9\u30e0\u3001\u6b21\u306b\u5404\u5c5e\u6027\u3092\u8868\u30594\u3064\u306e\u6d6e\u52d5\u5c0f\u6570\u70b9\u5909\u6570\u3001\u305d\u3057\u3066\u6700\u5f8c\u306b\u6587\u5b57\u5217\u3067\u3042\u308b\u8679\u5f69\u306e\u30af\u30e9\u30b9\u304c\u3042\u308a\u307e\u3059\u3002\u524d\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u4f7f\u7528\u3057\u305f\u30b3\u30fc\u30c9\u3067\u306f\u3001\u5404\u30ab\u30e9\u30e0\u306b\u30c7\u30fc\u30bf\u3092\u633f\u5165\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<div class=\"clipboard\">\n<pre><code class=\"language-java\"> columnList.add(new ColumnInfo(\"key\", GSType.INTEGER));\n columnList.add(new ColumnInfo(\"slenght\", GSType.FLOAT));\n columnList.add(new ColumnInfo(\"swidth\", GSType.FLOAT));\n columnList.add(new ColumnInfo(\"plenght\", GSType.FLOAT));\n columnList.add(new ColumnInfo(\"pwidth\", GSType.FLOAT));\n columnList.add(new ColumnInfo(\"irisclass\", GSType.STRING));<\/code><\/pre>\n<\/div>\n<p>\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001GridDB\u306b\u30c7\u30fc\u30bf\u304c\u683c\u7d0d\u3055\u308c\u307e\u3059\u3002<\/p>\n<div class=\"clipboard\">\n<pre><code class=\"language-java\">rowList.add(row);<\/code><\/pre>\n<\/div>\n<h2>GridDB\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b<\/h2>\n<p>\u30c7\u30fc\u30bf\u304cGridDB\u306b\u6b63\u3057\u304f\u683c\u7d0d\u3055\u308c\u305f\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306b\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u5185\u306e\u3059\u3079\u3066\u306e\u30ec\u30b3\u30fc\u30c9\u3092\u53d6\u5f97\u3059\u308b\u30af\u30a8\u30ea\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002\u3053\u306e\u64cd\u4f5c\u3092\u884c\u3046\u30b3\u30fc\u30c9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<div class=\"clipboard\">\n<pre><code class=\"language-java\">        \/\/ Retrieving data from GridDB\n        Container<?, Row> container = store.getContainer(containerName);\n        if ( container == null ){\n            throw new Exception(\"Container not found.\");\n        }\n        Query&lt;row> query = container.query(\"SELECT * \");\n        RowSet&lt;row> rowset = query.fetch();<\/code><\/pre>\n<\/div>\n<p>\u5f97\u3089\u308c\u305f\u30c7\u30fc\u30bf\u306f <code>rowset<\/code> \u5909\u6570\u306b\u683c\u7d0d\u3055\u308c\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u7c21\u5358\u306b\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3057\u305f\u308a\u3001\u5370\u5237\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<div class=\"clipboard\">\n<pre><code class=\"language-java\">        \/\/ Print GridDB data\n        while ( rowset.hasNext() ) {\n            Row row = rowset.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<h2>\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u3092\u69cb\u7bc9\u3059\u308b<\/h2>\n<p>\u672c\u8a18\u4e8b\u3067\u5f97\u3089\u308c\u308b\u7d50\u679c\u306f\u3001\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u5206\u985e\u5668\u3092\u4ee5\u4e0b\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3067\u5b9f\u884c\u3057\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n<p><code>P 100 -I 100 -num-slots 1 -K 0 -M 1.0 -V 0.001 -S 1<\/code><\/p>\n<p>\u3053\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092 Java \u3067\u5229\u7528\u3059\u308b\u306b\u306f\u3001\u307e\u305a <code>RandomForest<\/code> \u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304b\u3089\u59cb\u3081\u307e\u3059\u3002<\/p>\n<div class=\"clipboard\">\n<pre><code class=\"language-java\"> RandomForest randomForest = new RandomForest();<\/code><\/pre>\n<\/div>\n<p>\u6b21\u306b\u3001\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u306e\u914d\u5217\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u6b21\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3067\u5b9f\u73fe\u3057\u307e\u3059\u3002<\/p>\n<div class=\"clipboard\">\n<pre><code class=\"language-java\">String[] parameters = new String[14];\n     \nparameters[0] = \"-P\";\nparameters[1] = \"100\";\nparameters[2] = \"-I\";\nparameters[3] = \"100\";\nparameters[4] = \"-num-slots\";\nparameters[5] = \"1\";\nparameters[6] = \"-K\";\nparameters[7] = \"0\";\nparameters[8] = \"-M\";\nparameters[9] = \"1.0\";\nparameters[10] = \"-V\";\nparameters[11] = \"0.001\";\nparameters[12] = \"-S\";\nparameters[13] = \"1\";\n\nrandomForest.setOptions(parameters);<\/code><\/pre>\n<\/div>\n<p>Weka\u306e\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f\u3001\u516c\u5f0f\u306eJava Random Forest \u30af\u30e9\u30b9\u3092\u3054\u78ba\u8a8d\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u3053\u306e\u5f8c\uff0c\u5b66\u7fd2\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u7528\u3044\u3066\u5206\u985e\u5668\u3092\u69cb\u7bc9\u3057\u307e\u3059\uff0e\u3053\u306e\u6642\u70b9\u3067\uff0cEvaluation \u30af\u30e9\u30b9\u3092\u5229\u7528\u3057\u3066\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u8a55\u4fa1\u3059\u308b\u6e96\u5099\u304c\u6574\u3044\u307e\u3057\u305f\u3002\u305d\u3057\u3066\u3001\u30af\u30ed\u30b9\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306b\u3088\u308a\u30e2\u30c7\u30eb\u3092\u8a55\u4fa1\u3057\u3001\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u306b\u51fa\u529b\u3059\u308b\u4e88\u6e2c\u7d50\u679c\u3092\u5f97\u307e\u3059\u3002\u3053\u308c\u306f\u6b21\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3067\u5b9f\u73fe\u3055\u308c\u307e\u3059\u3002<\/p>\n<div class=\"clipboard\">\n<pre><code class=\"language-java\">randomForest.setOptions(parameters);\nrandomForest.buildClassifier(datasetInstances);\n \nEvaluation evaluation = new Evaluation(datasetInstances);\nevaluation.crossValidateModel(randomForest, datasetInstances, numFolds, new Random(1));\n\nSystem.out.println(evaluation.toSummaryString(\"nResultsn======n\", true));\n<\/code><\/pre>\n<\/div>\n<p>\u30b3\u30fc\u30c9\u306e\u6e96\u5099\u304c\u3067\u304d\u305f\u306e\u3067\u3001Java\u30b3\u30fc\u30c9\u306e\u30b3\u30f3\u30d1\u30a4\u30eb\u3068\u5b9f\u884c\u306b\u9032\u307f\u307e\u3059\u3002<\/p>\n<h2>\u30b3\u30fc\u30c9\u306e\u30b3\u30f3\u30d1\u30a4\u30eb\u3068\u5b9f\u884c<\/h2>\n<p>\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u304b\u3089 GridDB \u30d5\u30a9\u30eb\u30c0\u306b\u79fb\u52d5\u3057\u3001\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002Java \u30b3\u30fc\u30c9\u306f\u3001gsSample \u30d5\u30a9\u30eb\u30c0\u4e0b\u306e randomForest.java \u30d5\u30a1\u30a4\u30eb\u306b\u683c\u7d0d\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u307e\u305a\u3001\u3053\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u3001\u6b21\u306b\u5b9f\u884c\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3067\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n<div class=\"clipboard\">\n<pre><code class=\"language-java\">javac gsSample\/randomForest.java\njava gsSample\/randomForest.java<\/code><\/pre>\n<\/div>\n<h2>\u7d50\u8ad6\u3068\u7d50\u679c<\/h2>\n<p>\u30b3\u30fc\u30c9\u3092\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u3066\u5b9f\u884c\u3059\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u7d50\u679c\u304c\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u306b\u51fa\u529b\u3055\u308c\u307e\u3059\u3002\u307e\u305f\u3001Summary\u30bb\u30af\u30b7\u30e7\u30f3\u306e\u307f\u3092\u5370\u5237\u3059\u308b\u30aa\u30d7\u30b7\u30e7\u30f3\u3082\u3042\u308a\u307e\u3059\u3002\u4ed6\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3001\u4f8b\u3048\u3070\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u5b9f\u884c\u306e\u6587\u8108\u3092\u898b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u300cRun information\u300d\u306a\u3069\u3092\u898b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6df7\u540c\u884c\u5217\u306f\u3001\u30af\u30e9\u30b9\u306b\u5fdc\u3058\u3066\u5206\u985e\u3055\u308c\u305f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u8a73\u7d30\u306a\u30ab\u30a6\u30f3\u30c8\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n<p>\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u4f7f\u7528\u3057\u3066Iris\u30af\u30e9\u30b9\u3092\u4e88\u6e2c\u3059\u308b\u3068\u3001\u7cbe\u5ea6\u306f<strong>95.3%<\/strong>\u306b\u9054\u3057\u3001150\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u3046\u3061143\u304c\u6b63\u3057\u304f\u5206\u985e\u3055\u308c\u307e\u3057\u305f\u3002\u524d\u56de\u306e\u8a18\u4e8b\u3067\u306f\u3001\u6c7a\u5b9a\u6728\u3092\u4f7f\u7528\u3057\u305f\u5834\u5408\u3001\u7cbe\u5ea6\u306f\u7d0494%\u3067\u3057\u305f\u3002<\/p>\n<div class=\"clipboard\">\n<pre><code class=\"language-sh\">=== Run information ===\n\nScheme:       weka.classifiers.trees.RandomForest -P 100 -I 100 -num-slots 1 -K 0 -M 1.0 -V 0.001 -S 1\nRelation:     iris\nInstances:    150\nAttributes:   5\n              sepallength\n              sepalwidth\n              petallength\n              petalwidth\n              class\nTest mode:    10-fold cross-validation\n\n=== Classifier model (full training set) ===\n\nRandomForest\n\nBagging with 100 iterations and base learner\n\nweka.classifiers.trees.RandomTree -K 0 -M 1.0 -V 0.001 -S 1 -do-not-check-capabilities\n\nTime taken to build model: 0.01 seconds\n\n=== Stratified cross-validation ===\n=== Summary ===\n\nCorrectly Classified Instances         143               95.3333 %\nIncorrectly Classified Instances         7                4.6667 %\nKappa statistic                          0.93  \nMean absolute error                      0.0408\nRoot mean squared error                  0.1621\nRelative absolute error                  9.19   %\nRoot relative squared error             34.3846 %\nTotal Number of Instances              150     \n\n=== Detailed Accuracy By Class ===\n\n                 TP Rate  FP Rate  Precision  Recall   F-Measure  MCC      ROC Area  PRC Area  Class\n                 1,000    0,000    1,000      1,000    1,000      1,000    1,000     1,000     Iris-setosa\n                 0,940    0,040    0,922      0,940    0,931      0,896    0,991     0,984     Iris-versicolor\n                 0,920    0,030    0,939      0,920    0,929      0,895    0,991     0,982     Iris-virginica\nWeighted Avg.    0,953    0,023    0,953      0,953    0,953      0,930    0,994     0,989     \n\n=== Confusion Matrix ===\n\n  a  b  c   &lt;-- classified as\n 50  0  0 |  a = Iris-setosa\n  0 47  3 |  b = Iris-versicolor\n  0  4 46 |  c = Iris-virginica<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u306f\u3001\u5206\u985e\u306a\u3069\u306b\u7528\u3044\u3089\u308c\u308b\u6a5f\u68b0\u5b66\u7fd2\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u4e00\u3064\u3067\u3059\u3002\u672c\u30d6\u30ed\u30b0\u3067\u306f\u3001\u30a2\u30e4\u30e1\u79d1\u690d\u7269\u306e\u30af\u30e9\u30b9\u3092\u4e88\u6e2c\u3059\u308b\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306eJava\u306b\u3088\u308b\u5b9f\u88c5\u3092\u8aac\u660e\u3057\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u306b\u307e\u305a\u306f\u8981\u4ef6\u5b9a\u7fa9\u3092\u884c\u3044\u3001\u5fc5\u8981\u306a [&hellip;]<\/p>\n","protected":false},"author":41,"featured_media":49364,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1005],"tags":[],"class_list":["post-50784","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-1005"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Java\u306b\u3088\u308b\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u306e\u5b9f\u88c5\u65b9\u6cd5 | GridDB: Open Source Time Series Database for IoT<\/title>\n<meta name=\"description\" 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