R: Append a dataframe or an 'ffdf' to another 'ffdf'

ffdfappend {ffbase} | R Documentation

## Append a dataframe or an `ffdf` to another `ffdf`

### Description

Appends a dataframe or an `ffdf` called `dat` to an existing `ffdf` called `x`. Please note that the data of `x` will be coerced to the type of `y` if the corresponding column of `y` has a higher `vmode`.

### Usage

    ffdfappend(x, dat, recode = TRUE, adjustvmode = TRUE, ...)

### Arguments

`x` | `ffdf` object where data will be appended to. If `x==NULL` a new `ffdf` object will be created
`dat` | `ffdf` object or `data.frame` object
`recode` | should factors be recoded (default), or not (faster)
`adjustvmode` | logical, indicating to coerce the columns of `x` to a higher `vmode` to make sure `y` is appended without loss of information.
`...` | Further arguments passed to `as.ffdf`, when `x==NULL`

### Value

`ffdf` object with same physical storage as `x` unless the corresponding column of `y` has a higher `vmode` in which case the data will be cloned to the higher `vmode`

### See Also

`c.ff`

[Package ffbase version 0.13.1 Index]