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 3.ReadingData.

[Package limma version 1.9.6 Index]