getColClasses             package:limma             R Documentation

_C_o_n_s_t_r_u_c_t _c_o_l_C_l_a_s_s_e_s _v_e_c_t_o_r _f_o_r _u_s_e _w_i_t_h_i_n _r_e_a_d._t_a_b_l_e

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

     Construct a 'colClasses' vector, an argument in 'read.table' used
     in 'read.maimages'

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

     getColClasses(cols, ...)

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

    cols: A character vector of all columns to search against

     ...: Accepts any character lists, character vectors, or weight
          functions to match wanted columns against 'cols'

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

     This is an internally called function by 'read.maimages' to create
     a colClasses vector used in 'read.table' for fast loading of only
     required columns in 'read.maimages'

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

     Character. A named vector of classes to be assumed for the
     columns.  Possible values are NA (when 'type.convert' is used),
     "NULL" (when the column is skipped)

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

     Marcus Davy

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

     'wtVariables'

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

     allcnames <- c("Block","Column","Row","Name","ID", "F635 Mean","F532 Mean","Flag","Autoflag")
     Annotation <- c("Block","Column")
     Columns <- list(R="F635 Mean",G="F532 Mean")
     Other.columns <- "Autoflag"

     getColClasses(allcnames, Annotation, Columns, Other.columns, wtflags)
     rm(allcnames, Annotation, Columns, Other.columns) # tidy up

