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在以下方法乘以矩阵我试图乘以DenseVector一个DenseVector其中DenseVector之一是方法参数:使用ScalaNLP和微风
def mult(features : DenseVector[Array[Int]]) = {
val dv = new DenseVector(Array(-30, 20 , 20))
features :* dv
}
这会导致编译器错误:
Multiple markers at this line:
◾could not find implicit value for parameter op: breeze.linalg.operators.OpMulScalar.Impl2[breeze.linalg.DenseVector[Array[Int]],breeze.linalg.DenseVector[Int],That]
◾not enough arguments for method :*: (implicit op: breeze.linalg.operators.OpMulScalar.Impl2[breeze.linalg.DenseVector[Array[Int]],breeze.linalg.DenseVector[Int],That])That. Unspecified value parameter op.
◾could not find implicit value for parameter op: breeze.linalg.operators.OpMulScalar.Impl2[breeze.linalg.DenseVector[Array[Int]],breeze.linalg.DenseVector[Int],That]
◾not enough arguments for method :*: (implicit op: breeze.linalg.operators.OpMulScalar.Impl2[breeze.linalg.DenseVector[Array[Int]],breeze.linalg.DenseVector[Int],That])That. Unspecified value parameter op.
这代码汇编:
def mult(features : breeze.linalg.DenseVector[Array[Int]]) = {
val dv1 = new breeze.linalg.DenseVector(Array(-30, 20 , 20))
val dv2 = new breeze.linalg.DenseVector(Array(-30, 20 , 20))
dv1 :* dv2
}
如何将多个features
参数由dv
?我不确定编译器错误的含义,是否与我没有在方法中指定DenseVector的大小有关?