R: The nil object

nilObject {tractor.base} | R Documentation

## The nil object

### Description

The nil object is an empty object of class `SerialisableObject`. It can be used as a placeholder where such an object of this class, or one of its subclasses, is required. It serialises to the empty list.

### Usage

    nilObject()

    is.nilObject(object)

### Arguments

`object` | Any object.

### Value

`nilObject` returns the nil object. `is.nilObject` returns `TRUE` if its argument is identical to the nil object, or if it is equivalent in the sense of serialising to an identical result.

### Author(s)

Jon Clayden

### References

Please cite the following reference when using TractoR in your work:

J.D. Clayden, S. Muñoz Maniega, A.J. Storkey, M.D. King, M.E. Bastin & C.A. Clark (2011). TractoR: Magnetic resonance imaging and tractography with R. Journal of Statistical Software 44(8):1-18. http://www.jstatsoft.org/v44/i08/.

### See Also

`SerialisableObject`

[Package tractor.base version 3.2.2 Index]