R: The empty matrix

emptyMatrix {tractor.base} | R Documentation

## The empty matrix

### Description

The empty matrix is a standard matrix of dimensions 0 x 0. It is intended to be used as a placeholder where a matrix is required but no information is stored.

### Usage

    emptyMatrix()

    is.emptyMatrix(object)

### Arguments

`object` | Any object.

### Value

`emptyMatrix` returns the empty matrix, equivalent to `matrix(NA,0,0)`. `is.emptyMatrix` returns `TRUE` if its argument is identical to the empty matrix.

### 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/.

[Package tractor.base version 3.2.2 Index]