readImageneHeaders {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

    readImageneHeaders(file)

### Arguments

`file` | character string giving file name, including path if not in current working directory

### Details

Output files produced by the image analysis software Imagene include a number of lines of header 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

`Begin.Raw.Data` | line number immediately before the line where the intensity data begins
`Version` | version number of Imagene software
`Date` | character string giving time and data that array was scanned
`Image.File` | character string giving original file name to which data was written by Imagene
`Inverted` | logical
`Field.Dimension` | 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
`Measurement.Parameters` | list with numerical components `Signal.Low`, `Signal.High`, `Background.Low`, `Background.High`, `Background.Buffer` and `Background.Width`

### 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.

### Examples

    ## Not run:
    This function is not intended to be called by users.
    There is an example of use in the code for function read.imagene.
    ## End(Not run)
    print(read.imagene)

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