ruspini               package: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 clustering.
     _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)
     ## Not run: plot(pam(ruspini, 4), ask = TRUE)


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