Question

我有一个试图

的R脚本

vec size = 3x2

load.R

当我跑步时：

load("test.RData")

发生异常：

engine.eval(new FileReader("load.R"))

我不知道R.我只是试图使用R代码使用Renjin在Java / Scala应用程序中处理一些数据。

阅读documention上的数据部分没有说明从Exception in thread "main" java.lang.NoClassDefFoundError: org/tukaani/xz/XZInputStream at org.renjin.primitives.io.connections.Connections.gzfile(Connections.java:79) at org.renjin.primitives.R$primitive$gzfile.doApply(R$primitive$gzfile.java:75) at org.renjin.primitives.R$primitive$gzfile.apply(R$primitive$gzfile.java:36) at org.renjin.primitives.special.InternalFunction.apply(InternalFunction.java:45) at org.renjin.eval.Context.evaluateCall(Context.java:302) at org.renjin.eval.Context.evaluate(Context.java:222) at org.renjin.eval.Context.evaluate(Context.java:163) at org.renjin.sexp.Closure.doApply(Closure.java:83) at org.renjin.eval.ClosureDispatcher.apply(ClosureDispatcher.java:73) at org.renjin.eval.ClosureDispatcher.applyClosure(ClosureDispatcher.java:58) at org.renjin.sexp.Closure.apply(Closure.java:78) at org.renjin.eval.Context.evaluateCall(Context.java:302) at org.renjin.eval.Context.evaluate(Context.java:222) at org.renjin.primitives.special.AssignLeftFunction.assignLeft(AssignLeftFunction.java:57) at org.renjin.primitives.special.AssignLeftFunction.apply(AssignLeftFunction.java:41) at org.renjin.eval.Context.evaluateCall(Context.java:302) at org.renjin.eval.Context.evaluate(Context.java:222) at org.renjin.primitives.special.BeginFunction.apply(BeginFunction.java:38) at org.renjin.eval.Context.evaluateCall(Context.java:302) at org.renjin.eval.Context.evaluate(Context.java:222) at org.renjin.primitives.special.IfFunction.apply(IfFunction.java:40) at org.renjin.eval.Context.evaluateCall(Context.java:302) at org.renjin.eval.Context.evaluate(Context.java:222) at org.renjin.primitives.special.BeginFunction.apply(BeginFunction.java:38) at org.renjin.eval.Context.evaluateCall(Context.java:302) at org.renjin.eval.Context.evaluate(Context.java:222) at org.renjin.eval.Context.evaluate(Context.java:163) at org.renjin.sexp.Closure.doApply(Closure.java:83) at org.renjin.eval.ClosureDispatcher.apply(ClosureDispatcher.java:73) at org.renjin.eval.ClosureDispatcher.applyClosure(ClosureDispatcher.java:58) at org.renjin.sexp.Closure.apply(Closure.java:78) at org.renjin.eval.Context.evaluateCall(Context.java:302) at org.renjin.eval.Context.evaluate(Context.java:222) at org.renjin.eval.Context.evaluateExpressionVector(Context.java:285) at org.renjin.eval.Context.evaluate(Context.java:220) at org.renjin.script.RenjinScriptEngine.eval(RenjinScriptEngine.java:145) at org.renjin.script.RenjinScriptEngine.eval(RenjinScriptEngine.java:104) at com.infosistema.imp.restservice.data_treatment.DataTreatment.<init>(DataTreatment.scala:34) at com.infosistema.imp.restservice.data_treatment.Main$.<init>(DataTreatment.scala:45) at com.infosistema.imp.restservice.data_treatment.Main$.<clinit>(DataTreatment.scala) at com.infosistema.imp.restservice.data_treatment.Main.main(DataTreatment.scala) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147) Caused by: java.lang.ClassNotFoundException: org.tukaani.xz.XZInputStream at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 46 more文件加载数据。

更新： 在我的.RData文件中，我有：

build.sbt

Answer 1

在你的类路径上只有renjin-script-engine.jar是不够的，你也需要它的依赖。

如果您使用SBT构建Scala项目，则需要将以下内容添加到构建文件中：

resolvers +=
  "BeDataDriven" at "https://nexus.bedatadriven.com/content/groups/public"

lazy val root = (project in file(".")).
  settings(
    name := "renjin-test",
    version := "1.0",
    scalaVersion := "2.10.6",
    libraryDependencies += "org.renjin" % "renjin-script-engine" % "0.8.1886"
)

有关其他构建工具，请参阅： http://docs.renjin.org/en/latest/library/project-setup.html

Answer 2

问题是coursier无法解决所有依赖关系（没有任何通知）。

从addSbtPlugin("io.get-coursier" % "sbt-coursier" % "1.0.0-M15")删除plugins.sbt并使用sbt的默认解析程序修复了此问题。

使用Renjin从Scala中的R脚本加载.RData

2 个答案: