[R] Compact Indicator Matrices

[amarkos]

An indicator matrix is a binary matrix with orthogonal columns whose
rows sum to 1. A row of this matrix could be [0 1 0 0]. My problem is
to group the similar rows (profiles) so that to create a compact form
of the matrix.

Is there an R function that deals with this problem or do I have to
write it from scratch?

Thanks,
Angelos Markos
Dr. Applied Informatics,
University of Macedonia, Greece