Non Diagonal Part of a Matrix

Similarly to upper.tri and lower.tri, returns a matrix of logicals to identify the diagonal of a square matrix

non.diagonal(M, output = c("matrix.logical", "vector.values"))

Arguments

M	square matrix.
output	choose to either return a matrix of logical values (TRUEs, FALSEs on the diagonal, i.e. comparable behavior than upper.tri for instance) or a vector of the subsetted values of the matrix.

Value

either return a matrix of logical values (TRUEs, FALSEs on the diagonal) or a vector of the subsetted values of the matrix.

Examples

M<- matrix(sample(1:10,16,replace = TRUE),4,4)
non.diagonal(M)
#>       [,1]  [,2]  [,3]  [,4]
#> [1,] FALSE  TRUE  TRUE  TRUE
#> [2,]  TRUE FALSE  TRUE  TRUE
#> [3,]  TRUE  TRUE FALSE  TRUE
#> [4,]  TRUE  TRUE  TRUE FALSE