R: Getting and setting dimnames

dimnames.ff_array {ff} | R Documentation

## Getting and setting dimnames

### Description

For `ff_array`s you can set dimnames.

### Usage

      ## S3 method for class 'ff_array'
    dimnames(x)
      ## S3 replacement method for class 'ff_array'
    dimnames(x) <- value

### Arguments

`x` | a ff array (or matrix)
`value` | a list with length(dim(x)) elements (either NULL of character vector of length of dimension

### Details

if `vw` is set, `dimnames.ff\_array` returns the appropriate part of the names, but you can't set `dimnames` while `vw` is set. `dimnames` returns NULL for `ff_vectors` and setting `dimnames` for `ff_vector` is not allowed, but setting `names` is.

### Value

`dimnames` returns a list, see `dimnames`

### Author(s)

Jens Oehlschlägel

### See Also

`dimnames`, `dim.ff` , `names.ff` , `vw`, `virtual`

### Examples

      x <- ff(1:12, dim=c(3,4), dimnames=list(letters[1:3], LETTERS[1:4]))
      dimnames(x)
      dimnames(x) <- list(LETTERS[1:3], letters[1:4])
      dimnames(x)
      dimnames(x) <- NULL
      dimnames(x)
      rm(x); gc()

[Package ff version 2.2-13 Index]