

ruspini(cluster)                             R Documentation

_R_u_s_p_i_n_i _D_a_t_a

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

     The Ruspini data set, consisting of 75 points in four
     groups that is popular for illustrating clustering
     techniques.

_U_s_a_g_e_:

     data(ruspini)

_F_o_r_m_a_t_:

     A data frame with 75 observations on 2 variables giving
     the x and y coordinates of the points, respectively.

_S_o_u_r_c_e_:

     E. H. Ruspini (1970): Numerical methods for fuzzy clus-
     tering.  Inform. Sci., 2, 319-350.

_R_e_f_e_r_e_n_c_e_s_:

     Anja Struyf, Mia Hubert & Peter J. Rousseeuw (1996):
     Clustering in an Object-Oriented Environment.  Journal
     of Statistical Software, 1.  <URL:
     http://www.stat.ucla.edu/journals/jss/>

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

     data(ruspini)

     ## Plot similar to Figure 4 in Stryuf et al (1996)
     plot(pam(ruspini, 4), ask = TRUE)

     data(ruspini)

     ## Plot similar to Figure 4 in Stryuf et al (1996)
     plot(pam(ruspini, 4), ask = TRUE)

     ## Plot similar to Figure 6 in Stryuf et al (1996)
     plot(fanny(ruspini, 5))

     ## Plot similar to Figure 6 in Stryuf et al (1996)
     plot(fanny(ruspini, 5))

