filtering                package:som                R Documentation

_F_i_l_t_e_r _d_a_t_a _b_e_f_o_r_e _f_e_e_d_i_n_g _s_o_m _a_l_g_o_r_i_t_h_m _f_o_r _g_e_n_e _e_x_p_r_e_s_s_i_o_n _d_a_t_a

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

     Filtering data by certain floor, ceiling, max/min ratio, and max -
     min difference.

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

     filtering(x, lt=20, ut=16000, mmr=3, mmd=200)

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

       x: a data frame or matrix of input data. 

      lt: floor value replaces those less than it with the value 

      ut: ceiling value replaced those greater than it with the value 

     mmr: the max/min ratio, rows with max/min < mmr will be removed 

     mmd: the max - min difference, rows with (max - min) < mmd will be
          removed 

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

     An dataframe or matrix after the filtering

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

     Jun Yan <jyan@stat.uiowa.edu>

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

     'normalize'.

