Matlab中如何设置legend

参考code:
% 示例数据
x = linspace(0, 2pi, 100);
y1 = sin(x);
y2 = cos(x);
y3 = sin(2x);
y4 = cos(2*x);

% 绘制多条曲线
plot(x, y1, ‘r’, ‘DisplayName’, ‘sin(x)’);
hold on;
plot(x, y2, ‘b’, ‘DisplayName’, ‘cos(x)’);
plot(x, y3, ‘g’, ‘DisplayName’, ‘sin(2x)’);
plot(x, y4, ‘k’, ‘DisplayName’, ‘cos(2x)’);
hold off;

% 添加图例
lgd = legend;

% 设置图例属性
lgd.Box = ‘off’; % 关闭边框
lgd.Color = ‘none’; % 背景透明
lgd.NumColumns = 2; % 两列显示
lgd.Location = ‘best’; % 自动选择最佳位置