Read a Matrix Market file

readmtx.scala

import scala.io._

def readmtx (file:String) = {
    val source = Source.fromFile(file,"UTF-8").getLines.toList
    val lines = source.filter(x => x.head != '%')

    val info = ((lines(0)) split "[ ]+").map(x => x.toInt)
    val mat = Array.ofDim[Double] (info(0), info(1))

    for(i <- lines){
        val tmp = (i split "[ ]+")
        val (m,n,v) = (tmp(0).toInt-1, tmp(1).toInt-1, tmp(2).toDouble)
        mat (m) (n) = v
    }
    mat
}