readImaGeneHeader {limma} | R Documentation |
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.
readImaGeneHeader(file)
file |
character string giving file name or path |
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.
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 |
Gordon Smyth
http://www.biodiscovery.com/imagene.asp
An overview of LIMMA functions to read data is given in 3.ReadingData.