Matrix Diagonal
Generate diagonal matrices or return diagonal of a matrix
Diag(x, k = 0)
x |
vector or matrix |
k |
integer indicating a secondary diagonal |
If x is a vector, Diag(x, k) generates a matrix with x
as the (k-th secondary) diagonal.
If x is a matrix, Diag(x, k) returns the (k-th secondary) diagonal of x.
The k-th secondary diagonal is above the main diagonal for k > 0
and below the main diagonal for k < 0.
matrix or vector
In Matlab/Octave this function is called diag() and has a different
signature than the corresponding function in R.
Diag(matrix(1:12,3,4), 1) Diag(matrix(1:12,3,4), -1) Diag(c(1,5,9), 1) Diag(c(1,5,9), -1)
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