Check to see if a matrix is empty

Determine if a matrix is empty or not. A matrix is considered empty if it satisfies one of the following conditions:

• The dimensions of the matrix are 0-by-0 (all(dim(x) == 0))

• The dimensions of the matrix are 1-by-1 (all(dim(x) == 1)) and the sole vlaue is NA

These two situations correspond to matrices generated with either new('matrix') or matrix()

Usage

IsMatrixEmpty(x)

Arguments

x

A matrix

Value

TRUE if the matrix is empty otherwise FALSE

Examples

# \donttest{
srtdisk:::IsMatrixEmpty(new('matrix'))
#> [1] TRUE
srtdisk:::IsMatrixEmpty(matrix())
#> [1] TRUE
srtdisk:::IsMatrixEmpty(matrix(1:9, nrow = 3))
#> [1] FALSE
# }