Get the main diagonal of a matrix, or put a vector into the main diagonal of a matrix.

取得的主要矩阵，或将一个向量到对角线的主要矩阵对角线。

A diagonal Latin square is a Latin square whose main diagonal and back diagonal areboth transversals.

对角拉丁方是主对角线和反对角线均为截态的拉丁方。

The determinant of a diagonal matrix is the product of the entries on its main diagonal.

对角线矩阵的行列式值是其对角线元素的连积。