duplicated              package:arules              R Documentation

_F_i_n_d _D_u_p_l_i_c_a_t_e_d _E_l_e_m_e_n_t_s

_D_e_s_c_r_i_p_t_i_o_n:

     Provides the generic function 'duplicated'  and the S4 methods for
     'itemMatrix' and associations.  'duplicated' finds duplicated
     elements in an 'itemMatrix'.  It returns a logical vector
     indicating which elements are duplicates.

     Note that 'duplicated' can also be used to find transactions with
     identical items and identical rules and itemsets in collections
     stored in 'rules' and 'itemsets'.

_U_s_a_g_e:

     duplicated(x, incomparables = FALSE, ...)

_A_r_g_u_m_e_n_t_s:

       x: an object of class 'itemMatrix' or associations.

     ...: further arguments (currently unused). 

incomparables: argument currently unused.

_V_a_l_u_e:

     A logical vector indicating duplicated elements.

_S_e_e _A_l_s_o:

     'unique', 'rules-class', 'itemsets-class', 'itemMatrix-class'

_E_x_a_m_p_l_e_s:

     data("Adult")

     r1 <- apriori(Adult[1:1000], parameter = list(support = 0.5))
     r2 <- apriori(Adult[1001:2000], parameter = list(support = 0.5))

     ## Note this creates a collection of rules from two sets of rules
     r_comb <- c(r1, r2)
     duplicated(r_comb)

