diag {base}

R Documentation

Matrix Diagonals

Usage

diag(x, nrow, ncol)
diag(x) <- value

Value

If x is a matrix then diag(x) returns the diagonal of x. If x is a vector then x returns a diagonal matrix whose diagonal is x. If x is an integer then diag(x) returns an identity matrix of order x. The dimension of the returned matrix can be specified by nrow and ncol (the default is square).

The assignment form sets the diagonal of the matrix x to the given value(s).

See Also

matrix.

Examples

dim(diag(3))
diag(10,3,4) # guess what?

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