readImaGeneHeader           package:limma           R Documentation

_R_e_a_d _I_m_a_G_e_n_e _H_e_a_d_e_r _I_n_f_o_r_m_a_t_i_o_n

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

     Read the header information from an ImaGene image analysis output
     file. This function is used internally by 'read.maimages' and is
     not usually called directly by users.

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

     readImaGeneHeader(file)

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

    file: character string giving file name or path

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

     The raw data files exported by the image analysis software ImaGene
     include a number of header lines which contain information about
     the printing process. This function extracts that information and
     locates the line where the intensity data begins.

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

     A list with components 

NHeaderRecords: number of lines in the file before the intensity data
          begins

 Version: version number of ImaGene software

    Date: character string giving time and data that array was scanned

ImageFile: character string giving original file name to which data was
          written by ImaGene

Inverted: logical

FieldDimension: list with components 'Field' containing a character
          string, 'Metarows' containing number of grid rows, 'Metacols'
          containing number of grid columns, 'Rows' containing number
          of spot rows in each grid, 'Cols' containing number of spot
          columns in each grid

MeasurementParameters: list with numerical components 'SignalLow',
          'SignalHigh', 'BackgroundLow', 'BackgroundHigh',
          'BackgroundBuffer' and 'BackgroundWidth'

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

     Gordon Smyth

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

     <URL: http://www.biodiscovery.com/imagene.asp>

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

     'read.imagene'

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

