R: The function 'droplevels' is used to drop unused levels from...

droplevels.ffdf {ffbase} | R Documentation

## The function `droplevels` is used to drop unused levels from factors in a `ffdf`

### Description

The function `droplevels` is used to drop unused levels from factors in a `ffdf`

### Usage

    ## S3 method for class 'ffdf'
    droplevels(x, except = NULL, ..., inplace = FALSE)

### Arguments

`x` | `ffdf` object
`except` | specify which columns will be excluded from dropping levels
`...` | further arguments passed to `droplevels.ff`
`inplace` | if `TRUE` the columns will be physically changed, otherwise (default) new `ff` vectors will be created

### Value

`ffdf` object where levels of factors are dropped

### See Also

`droplevels` `droplevels.ff`

[Package ffbase version 0.13.1 Index]