16.4.2.5 Matrix Property Functions

Matrix Function: NROW ( M) Matrix Function: NCOL ( M)

Returns the number of row or columns, respectively, in M.

NROW({1, 0; -2, -3; 3, 3}) ⇒ 3
NROW(1:5) ⇒ 1

NCOL({1, 0; -2, -3; 3, 3}) ⇒ 2
NCOL(1:5) ⇒ 5

Matrix Function: DIAG ( M)

Returns a column vector containing a copy of M’s main diagonal. The vector’s length is the lesser of NCOL(M) and NROW(M).

DIAG({1, 0; -2, -3; 3, 3}) ⇒ {1; -3}