P                  package:GolubRR                  R Documentation

_P: _T_h_e _c_o_r_r_e_l_a_t_i_o_n _b_e_t_w_e_e_n _g_e_n_e _e_x_p_r_e_s_s_i_o_n _a_n_d _c_l_a_s_s

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

     'P' computes a statistic defined in Note 16 of Golub et al and
     referred to there as a correlation. It is defined for two group
     problems and is the difference in means divided by the sum of the
     within group standard deviations.

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

     P(g, c)

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

       g: A vector of gene expressions. 

       c: A vector of class labels 

_D_e_t_a_i_l_s:

     Given in the description.

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

     The correlation.

_A_u_t_h_o_r(_s):

     R. Gentleman

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

     Molecular Classification of Cancer: Class Discovery and Class
     Prediction by  Gene Expression Monitoring, Science, 531-537, 1999,
     T. R. Golub and D. K. Slonim and P. Tamayo and C. Huard and M.
     Gaasenbeek and J. P. Mesirov and H. Coller and M.L. Loh and J. R.
     Downing and M. A. Caligiuri and C. D. Bloomfield and E. S. Lander

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

     'dovote'

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

      set.seed(123)
      P(rnorm(20), rep(1:2, 10))

