On Wed, Jun 18, 2014 at 5:39 PM, Dmitriy Lyubimov <dlie...@gmail.com> wrote:
> > Also, note that the row keys in Mahout are not actually stored in the > > matrices that we manipulate. > > > They are. I am not sure about DistributedRowMatrix class for mapreduce, but > in sparkbindings they are. they are intimately relevant to all algebra and > especially transposition rewrites. > > Even in-core matrices support column/row labels, although nobody seems to > be using it. > Are you saying that the values in the matrix are non-numbers? Or simply that rows and columns are labeled? I was trying to say the latter and add that the core of the matrix is entirely numerical. This is certainly true of the in-core math.
