linear.constraint.iq creates a vector-based linear inequality
constraint: Aeq(range) * factors <= beq
linear.constraint.iq(constraints.linear, range, b, factors = NULL,
leq = TRUE)the current set of inequality constraints
the range of the variables to set (default 1 if factors is NULL)
right-hand side scalar
values to set for each variable in the given range
if false then the sign of the constraint will be inversed
the new (updated) set of inequality constraints