readHeader {limma}R Documentation

Read Header Information from Image Analysis Raw Data File

Description

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.

Usage

readGPRHeader(file)
readSMDHeader(file)

Arguments

file character string giving file name or including path

Details

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

Value

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.

Author(s)

Gordon Smyth

References

http://www.axon.com/gn_GenePix_File_Formats.html

http://genome-www.stanford.edu/Microarray

See Also

read.maimages

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


[Package limma version 1.9.6 Index]