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 and scanning processes. This function extracts that information and locates the line where the intensity data begins.

### Value

A list containing information read from the header of the ImaGene file. Each Begin-End environment found in the file header will become a recursive list in the output object, with components corresponding to fields in the file. See the ImaGene documentation for further information. The output object will also contain a component `NHeaderRecords`giving the number of lines in the file before the intensity data begins.

### 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.

### Examples

    ## Not run:
    h <- readImaGeneHeader("myImaGenefile.txt")
    names(h)
    h$NHeaderRecords
    h[["Field Dimensions"]]
    ## End(Not run)

[Package limma version 2.2.0 Index]