On Tue, Jul 8, 2014 at 10:29 AM, Pat Ferrel <[email protected]> wrote:

> To do this correctly for all cases the row IDs for all unique row keys
> would have to be created across all drms for cooccurrence. This implies
> using a single Map for the row space of all drms read in with a single
> incrementing integer for the DRM row key. The length of this Map would be
> the row dimension for all DRMs. After the row dimension is calculated the
> Map could be thrown away since only columns (input items) need to have
> application specific IDs applied at output.


The row id's have to be identical for both matrices in any case.  You
really do need to convert to an identical set of id's and have the same
size.

(Stated more simply ... this exception is actually correct.  This won't
work unless the matrices have the same rows)

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