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 are not usually called directly by users.
readBlueFuseHeader(file) readGPRHeader(file) readSMDHeader(file)
file |
character string giving file name. If it does not contain an absolute path, the file name is relative to the current working directory. |
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.
readBlueFuseHeader
is for BlueFuse output, readGPRHeader
is for GenePix output, readSMDHeader
is for files from the Stanford Microarray Database (SMD).
A list with components corresponds to lines of header information.
A key component is NHeaderRecords
which gives the number of lines in the file before the intensity data begins.
All other components are character vectors.
Gordon Smyth. Gregory Lefebvre wrote the original version of readBlueFuseHeader.
See http://www.axon.com/gn_GenePix_File_Formats.html for GenePix formats.
See http://www.bluegnome.co.uk for information on BlueFuse.
See http://genome-www.stanford.edu/Microarray for the SMD.
An overview of LIMMA functions to read data is given in 03.ReadingData.