R: Closing ff files

close.ff {ff} | R Documentation

## Closing ff files

### Description

Close frees the Memory Mapping resources and closes the ff file without deleting the file data.

### Usage

    ## S3 method for class 'ff'
    close(con, ...)
    ## S3 method for class 'ffdf'
    close(con, ...)
    ## S3 method for class 'ff_pointer'
    close(con, ...)

### Arguments

`con` | an open ff object
`...` | `...`

### Details

The `ff_pointer` method is not intended for manual use, it is used at finalizer dispatch time. Closing ffdf objects will close all of their `physical` components including their `row.names` if they are `is.ff`

### Value

TRUE if the file could be closed, FALSE if it was closed already (or NA if not all components of an ffdf returned FALSE or TRUE on closing)

### Author(s)

Jens Oehlschlägel

### See Also

`ff`, `open.ff`, `delete`, `deleteIfOpen`

### Examples

      x <- ff(1:12)
      close(x)
      x
      open(x)
      x
      rm(x); gc()

[Package ff version 2.2-13 Index]