ldiag function

Left (i.e., pre) Multiply a matrix by a diagonal matrix

ldiag: Left (i.e., pre) Multiply a matrix by a diagonal matrix (with only the diagonal elements being given).

ldiag(y, X)

Arguments

• y: a $I$ element vector (of the diagonal elements of an $I$ by $I$ matrix)
• X: an $I$ by $J$ matrix.

Returns

an $I$ by $J$ matrix equal to diag(y )

See Also

rdiag

Author(s)

Hervé Abdi