Matlab图例与绘图不匹配

我使用以下代码生成绘图（我希望稍后将其包含在LateX文档中）：

图表如下所示：

显然，“绑定长波”图例与图中的颜色和线条规格不匹配。 据我所知，它与标量/向量有关，但我无法找出错误所在

---

如何继续？

您实际上创建了四个打印对象，但仅为其中三个提供图例。如果我们对

plot

语句进行分解，我们可以对绘图进行计数（请记住，使用矩阵调用

plot

会将每一列绘制为不同的绘图）

clear all; close all; clc;
a1 = 1; a2 = 1; c1 = 2.0; c2 = 1.8; time = 0:0.1:300;
wave1 = a1 * sin(c1*time); 
wave2 = a2 * sin(c2*time); 
wave3 = wave1 + wave2; 

y = hilbert(wave3);
env = abs(y);

bound = 0.1*cos(0.2*time-pi);

plot(time,wave3,'k',time,[-1;1]*env,'--k',time,bound,'-.r', 'Linewidth',1.2);

ylabel(' $\eta$ (m)');
xlabel(' Time (s)'); 
legend = legend({'Short waves','Wave group envelope','Bound long wave'});
set(legend, 'FontSize',20);
axis([15.7 110 -2.5 2.5]);

plot(time, wave3, 'k', ...          <--- This is one plot
     time, [-1;1]*env, '--k', ...   <--- This is TWO plots (one negative, one positive)
     time, bound, '-.r', ...        <--- This is one plot
     'Linewidth',1.2);

p = plot(time, wave3, 'k', ...
         time, [-1; 1] * env, '--k', ...
         time, bound, '-.r', ...
         'LineWidth', 1.2);

% Skip the third plot since that will just be the "negative" envelope
legend(p([1 2 4]), {'Short waves','Wave group envelope','Bound long wave'});