tango                package:DCluster                R Documentation

_T_a_n_g_o'_s _s_t_a_t_i_s_t_i_c _f_o_r _g_e_n_e_r_a_l _c_l_u_s_t_e_r_i_n_g

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

     Tango's statistic to perform a general clustering test is
     expressed as follows:


                          T = (r-p)' A (r-p)


     where r' = [O_1/O_+, ..., O_n/O_+],  p' = [E_1/E_+, ..., E_n/E_+] 
     and A is a matrix of closeness which measures the cloneness
     between two zones (the higher the closer).

     Tango proposes to take A_ij=exp(-D/phi), where D_ij is the
     distance between centroids of regions _i_ and _j_, and phi is a
     constant that measures how strong is the relationship between
     regions in a general way.

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

     Tango, Toshiro (1995). A Class of Tests for Detecting 'General'
     and 'Focused' Clustering of Rare Diseases. Statistics in Medicine
     14, 2323-2334.

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

     DCluster, tango.stat, tango.boot, tango.pboot

