maffy.subset              package:affy              R Documentation

_S_e_l_e_c_t _S_u_b_s_e_t

_D_e_s_c_r_i_p_t_i_o_n:

     Select a subset of rows with small rank-range over columns.

_U_s_a_g_e:

     maffy.subset(data,subset.size=5000,maxit=100,
                  subset.delta=max(round(subset.size/100),25),verbose=FALSE)

_A_r_g_u_m_e_n_t_s:

    data: a matrix

subset.size: desired size of subset

   maxit: maximum number of iterations

subset.delta: maximum deviation from subset.size

 verbose: logical value.

_D_e_t_a_i_l_s:

     Please refer to references.

_V_a_l_u_e:

     A list with component 'subset', the indexes for subset.

_A_u_t_h_o_r(_s):

     Magnus Astrand

_R_e_f_e_r_e_n_c_e_s:

     Astrand, M. (2001) <URL:
     http://www.math.chalmers.se/~magnusaa/maffy/>

_S_e_e _A_l_s_o:

     'maffy.normalize'

_E_x_a_m_p_l_e_s:

     if (require(affydata)) {
       #data(Dilution)
       #x <- log2(pm(Dilution)[,1:3])
       #Index <- maffy.subset(x,subset.size=100)$subset
       #mva.pairs(x[Index,])
     }

