MSPatients                package:vcd                R Documentation

_D_i_a_g_n_o_s_i_s _o_f _M_u_l_t_i_p_l_e _S_c_l_e_r_o_s_i_s

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

     Data from Westlund & Kurland (1953) on the diagnosis of multiple
     sclerosis (MS): two samples of patients, one from Winnipeg and one
     from New Orleans, were each rated by two neurologists (one from
     each city) in four diagnostic categories.

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

     data(MSPatients)

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

     A 3-dimensional array resulting from cross-tabulating 218
     observations on 3 variables.  The variables and their levels are
     as follows:

       No  Name                     Levels
        1  New Orleans Neurologist  Certain, Probable, Possible, Doubtful
        2  Winnipeg Neurologist     Certain, Probable, Possible, Doubtful
        3  Patients                 Winnipeg, New Orleans

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

     M. Friendly (2000), Visualizing Categorical Data: <URL:
     http://euclid.psych.yorku.ca/ftp/sas/vcd/catdata/msdiag.sas>

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

     K. B. Westlund & L. T. Kurland (1953), Studies on multiple
     sclerosis in Winnipeg, Manitoba and New Orleans, Louisiana,
     _American Journal of Hygiene_, *57*, 380-396.

     M. Friendly (2000), _Visualizing Categorical Data_. SAS Institute,
     Cary, NC.

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

     data(MSPatients)
     get(getOption("device"))(width = 12)
     pushViewport(viewport(layout = grid.layout(ncol = 2)))
     pushViewport(viewport(layout.pos.col = 1))
     agreementplot(t(MSPatients[,,1]), main = "Winnipeg Patients",
                   newpage = FALSE)
     popViewport()
     pushViewport(viewport(layout.pos.col = 2))
     agreementplot(t(MSPatients[,,2]), main = "New Orleans Patients",
                   newpage = FALSE)
     popViewport(2)
     dev.off()

