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.
emptyMatrix()is.emptyMatrix(object)
emptyMatrix returns the empty matrix, equivalent to
matrix(NA,0,0). is.emptyMatrix returns TRUE if its
argument is identical to the empty matrix.
Any object.
Jon Clayden
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. https://www.jstatsoft.org/v44/i08/.