Thanks. On Sat, Nov 12, 2011 at 2:54 AM, Sebastian Schelter <[email protected]> wrote:
> On 12.11.2011 11:26, Sean Owen wrote: > > Looking at the uses of it, I think it receives as input vectors that > > are "non overlapping" and is just stitching them together, so yes it's > > correct. > > But Sebastian can double-check. > > It is used exactly as Sean says. It is applied in the first pass over > the data which transposes the input matrix and we are sure that there > are no overlapping dimensions. > > > --sebastian > > > > > On Sat, Nov 12, 2011 at 2:48 AM, Lance Norskog <[email protected]> > wrote: > >> > org.apache.mahout.math.hadoop.similarity.cooccurrence.Vectors.merge(Iterable<VectorWritable>) > >> > >> This ORs together several (sparse) VectorWritables. It does not sum > >> together overlapping dimensions, it just overwrites them from the most > >> final vector in the list. Is this ok? Should they be summed? > >> > >> -- > >> Lance Norskog > >> [email protected] > >> > > -- Lance Norskog [email protected]
