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• SliceMatrix.scala

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breeze.linalg.SliceMatrix.scala Maven / Gradle / Ivy

package breeze.linalg

class SliceMatrix[@specialized(Int) K1,
                  @specialized(Int) K2,
                  @specialized(Int, Double, Float) V](val tensor: QuasiTensor[(K1, K2),V],
                                                      val slice1: IndexedSeq[K1], val slice2: IndexedSeq[K2]) extends Matrix[V] {

  def apply(i: Int, j: Int): V = tensor(slice1(i)->slice2(j))

  def update(i: Int, j: Int, e: V) {tensor(slice1(i)->slice2(j)) = e}

  def rows: Int = slice1.length

  def cols: Int = slice2.length

  def activeValuesIterator: Iterator[V] = valuesIterator
  def activeIterator: Iterator[((Int, Int), V)] = iterator
  def activeKeysIterator: Iterator[(Int, Int)] = keysIterator

  def activeSize: Int = size

  def repr: Matrix[V] = this
}