Create (equality or inequality) constraint object
newConstraint( name, ..., eq = "==", rhs = data.frame(), for.each = NULL, defVal = 0, arg = NULL )
Name of the constrain object (will be used in GAMS or GLPK as an element in sets)
Left-hand side (LHS) terms of the statement - list objects with
Type of the relation ('==' default, '<=', '>=')
list or data frame with named sets ()
list with sets for which constraint will be created.
the default value for the rhs.
Object of class `constraint`.