R: Reads the header of an Affymetrix probe data (APD) file

readApdHeader {aroma.apd} | R Documentation

## Reads the header of an Affymetrix probe data (APD) file

### Description

Reads the header of an Affymetrix probe data (APD) file.

### Usage

    ## Default S3 method:
    readApdHeader(filename, ..., verbose=FALSE, .checkArgs=TRUE)

### Arguments

`filename` | The filename of the APD file.
`...` | Not used.
`verbose` | See `Verbose`.
`.checkArgs` | If `TRUE`, arguments are validated, otherwise not.

### Details

The file format of an APD file is identical to the file format of an `FileVector`. Most elements of the APD header are stored in the `comment` `character` string of the file vector's header. The APD header `nbrOfProbes` is identical to the length of the file vector, and is not stored in the above comment string.

### Value

A named `list`. The `numeric` element `nbrOfProbes` is the number of probe values available in the APD file. The optional `character` element `name` specifies the name of the APD vector. The optional `character` element `chipType` specifies the chip type, cf. the same field in `readCelHeader`. The optional `character` element `maptype` specifies the type of probe-index map for this APD file. Its value can be used to find the mapping file, see `findApdMap`() and `readApdMap`(). All other fields are optional and `character` values.

### Author(s)

Henrik Bengtsson

### See Also

`readApd`().

### Examples

    ## Not run: #See ?createApd for an example.

[Package aroma.apd version 0.6.0 Index]