fDataToUnknown {pRoloc} | R Documentation

## Update a feature variable

### Description

This function replaces a string or regular expression in a feature variable using the `sub` function.

### Usage

    fDataToUnknown(object, fcol = "markers", from = "^$", to = "unknown",
      ...)

### Arguments

`object` | An instance of class `MSnSet`.
`fcol` | Feature variable to be modified. Default is `"markers"`. If `NULL`, all feature variables will updated.
`from` | A `character` defining the string or regular expression of the pattern to be replaced. Default is the empty string, i.e. the regular expression `"^$"`. See `sub` for details. If `NA`, then `NA` values are replaced by `to`.
`to` | A replacement for matched pattern. Default is `"unknown"`. See `sub` for details.
`...` | Additional arguments passed to `sub`.

### Value

An updated `MSnSet`.

### Author(s)

Laurent Gatto

### Examples

    library("pRolocdata")
    data(dunkley2006)
    getMarkers(dunkley2006, "markers")
    dunkley2006 <- fDataToUnknown(dunkley2006,
                                  from = "unknown", to = "unassigned")
    getMarkers(dunkley2006, "markers")

[Package pRoloc version 1.27.6 Index]