scaleMatrix function

Tensor<Matrix> scaleMatrix(
  1. Tensor<Matrix> m,
  2. double s
)

Implementation

Tensor<Matrix> scaleMatrix(Tensor<Matrix> m, double s) {
  int numRows = m.shape[0];
  int numCols = m.shape[1];

  Matrix mMat = m.value;

  Matrix outValue = [];
  for (int i = 0; i < numRows; i = i + 1) {
    Vector row = [];
    for (int j = 0; j < numCols; j = j + 1) {
      row.add(mMat[i][j] * s);
    }
    outValue.add(row);
  }

  Tensor<Matrix> out = Tensor<Matrix>(outValue);

  out.creator = Node(
    [m],
        () {
      int length = m.data.length;
      for (int i = 0; i < length; i = i + 1) {
        m.grad[i] = m.grad[i] + out.grad[i] * s;
      }
    },
    opName: 'scale_matrix',
    cost: numRows * numCols,
    extraParams: {'s': s},
  );
  return out;
}