readImaGeneHeader {limma}R Documentation

Read ImaGene Header Information

Description

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.

Usage

readImaGeneHeader(file)

Arguments

file character string giving file name or path

Details

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.

Value

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

Author(s)

Gordon Smyth

References

http://www.biodiscovery.com/imagene.asp

See Also

read.imagene

An overview of LIMMA functions to read data is given in 03.ReadingData.


[Package limma version 2.0.8 Index]