Counter2Ops

Returns the k-norm of this Vector. implicit def canNorm[K1, K2, V:Ring]:CanNorm[Counter2[K1, K2, V]] = new CanNorm[Counter2[K1, K2, V]] { val field = implicitly[Ring[V]] def apply(c: Counter2[K1, K2, V], n: Double): Double = { import c._

  if (n == 1) {
    var sum = 0.0
    activeValuesIterator foreach (v => sum += field.norm(v))
    sum
  } else if (n == 2) {
    var sum = 0.0
    activeValuesIterator foreach (v => { val nn = field.norm(v); sum += nn * nn })
    math.sqrt(sum)
  } else if (n == Double.PositiveInfinity) {
    var max = Double.NegativeInfinity
    activeValuesIterator foreach (v => { val nn = field.norm(v); if (nn > max) max = nn })
    max
  } else {
    var sum = 0.0
    activeValuesIterator foreach (v => { val nn = field.norm(v); sum += math.pow(nn,n) })
    math.pow(sum, 1.0 / n)
  }
}

}