  The patterns of R violation resulting from imposition of a gauged U(1)
horizontal symmetry, on the minimal supersymmetric standard model are
systematically analyzed. We concentrate on a class of models with integer U(1)
charges chosen to reproduce the quark masses and mixings as well as charged
lepton masses exactly or approximately. The U(1) charges are further restricted
from the requirement that very large bilinear lepton number violating terms
should not be allowed in the super-potential. It is shown that all the
trilinear $\lambda'_{ijk}$ and all but at most two trilinear $\lambda_{ijk}$
couplings vanish or are enormously suppressed.
