也许是这样的:可能会有这样的情况 N = 6; % Size of matrix a = 1; % Example value b = 2; % Example value A = a*eye(N) + b*fliplr(eye(N)); A = 1 0 0 0 0 2 0 1 0 0 2 0 0 0 1 2 0 0 0 0 2 1 0 0 0 2 0 0 1 0 2 0 0 0 0 1