Diag | R Documentation |
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
, Trace
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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