Scala Saddle：ScalarTag 没有类定义答案

【问题标题】：Scala Saddle: No class def for ScalarTagScala Saddle：ScalarTag 没有类定义
【发布时间】：2014-02-19 04:49:46
【问题描述】：

我尝试基于鞍的 Series 类创建一个 TimeSeries 类。我在测试中收到以下错误：

java.lang.NoClassDefFoundError: org/saddle/scalar/ScalarTag

我的 TimeSeries 课程：

object TimeSeries {

  def apply[V: ST](values: (LocalDate, V)*): TimeSeries[V] = {
    new TimeSeries(Series(values: _*))
  }
}

class TimeSeries[V: ST](values: Series[LocalDate, V]) { ... }

我的测试：

class TimeSeriesTest extends WordSpec with GivenWhenThen with ShouldMatchersForJUnit {
  "TimeSeries" when {

  val d2014_02_01 = new LocalDate(2014, 2, 1);
  val d2014_02_03 = new LocalDate(2014, 2, 3);
  val d2014_02_04 = new LocalDate(2014, 2, 4);

  "created with data points as arguments" should {
    "have the earliest point as start, the latest as the end, and a length" in {                   
      val a = TimeSeries(d2014_02_01 -> 0.6, d2014_02_03 -> 4.5, d2014_02_04 -> 0.9)

      ...
    }
  }
}

我的猜测是它与 TimeSeries 类中绑定的上下文有关。我是那个话题的新手。有什么建议吗？

【问题讨论】：

标签： scala time-series saddle

【解决方案1】：

添加 LocalDate 排序后，您的代码可以正常工作（没有错误）。尝试使用这个 build.sbt：

scalaVersion := "2.10.3"

resolvers ++= Seq(
    "Sonatype Snapshots" at "http://oss.sonatype.org/content/repositories/snapshots",
      "Sonatype Releases" at "http://oss.sonatype.org/content/repositories/releases"
    )

libraryDependencies ++= Seq(
  "org.scalatest" % "scalatest_2.10" % "2.0" % "test",
  "org.scala-saddle" %% "saddle-core" % "1.3.+",
  "joda-time" % "joda-time" % "2.3",
  "org.joda" % "joda-convert" % "1.2",
  "com.novocode" % "junit-interface" % "0.9" % "test"
  // (OPTIONAL) "org.scala-saddle" %% "saddle-hdf5" % "1.3.+"
  )

https://github.com/goozez/saddle-skeleton

【讨论】：

谢谢你的答案。现在可以了。显然，Saddle 不是在测试，而是在构建。