readHeader {limma} | R Documentation |
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.
readGPRHeader(file) readSMDHeader(file)
file |
character string giving file name or including path |
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
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.
Gordon Smyth
http://www.axon.com/gn_GenePix_File_Formats.html
http://genome-www.stanford.edu/Microarray
An overview of LIMMA functions to read data is given in 3.ReadingData.