Construct an '>unfolded_dtensor from a dense matrix, mode, and dimensions of original tensor.
unfolded_dtensor(mat, mode, tensor_dims)# S4 method for Matrix,numeric,numeric
unfolded_dtensor(mat, mode, tensor_dims)
dense matrix representing unfolded tensor
dimension to unfold tensor along
original dimensions of tensor (useful for re-folding)
unfolded_dtensor-class
for class documentation.