readHeader               package:limma               R Documentation

_R_e_a_d _H_e_a_d_e_r _I_n_f_o_r_m_a_t_i_o_n _f_r_o_m _I_m_a_g_e _A_n_a_l_y_s_i_s _R_a_w _D_a_t_a _F_i_l_e

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

     Read the header information from a GenePix Results (GPR) file or
     from an SMD raw data file. These functions are used internally by
     'read.maimages' and is not usually called directly by users.

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

     readGPRHeader(file)
     readSMDHeader(file)

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

    file: character string giving file name or including path

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

     Raw data files exported by image analysis programs include a
     number of header lines which contain information about the
     scanning process. This function extracts that information and
     locates the line where the intensity data begins. 'readGPRHeader'
     is for GenePix output, 'readSMDHeader' is for

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

     A list with components corresponds to lines of header information.
     All components are character vectors. A key component is
     'NHeaderRecords' which gives the number of lines in the file
     before the intensity data begins.

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

     Gordon Smyth

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

     <URL: http://www.axon.com/gn_GenePix_File_Formats.html>

     <URL: http://genome-www.stanford.edu/Microarray>

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

     'read.maimages'

     An overview of LIMMA functions to read data is given in
     3.ReadingData.

