如何将breeze.linalg.DenseMatrix转换为Map [String，Value]？

Question

我需要将DenseMatrix转换为Map [String，[Value]]。关键字将是第一行的每个值。相应键的值将是列。

eg: 

Solid liquid Gas 
Stone Water Oxygen 
Gold kerosene Nitrogen 

So map will be Map(Solid -> [Stone,Gold],Liquid -> [Water,kerosene],Gas -> [Oxygen,Nitrogen]) 

Answer 1

我觉得是这样的：

val mat = DenseMatrix(("Solid", "liquid", "gas"), ("Stone", "Water", "Oxygen"), ("Gold", "kerosene", "Nitrogen")) 

{ 
    for { 
    i <- 0 until mat.rows 
    } yield (mat(i, 0) -> mat(i, 1 until mat.cols)) 
} toMap