【matlab绘图】如何绘制fill图+legend如何只显示最后一个图线的注释

fill图：绘图时将某一区域全部"填充"成某一颜色

legend如何只显示最后一个图线的注释：实际绘图时，legend必须得一个一个显示图线的注释，比如有10个图线，但是只想显示最后一个图线的说明，此时就得用以下句柄：

h = findobj(gca, 'Type', 'line'); % 找到所有线形对象
lastLineHandle = h(end); % 获取最后一个线形对象
legend(lastLineHandle, 'Data'); % 只显示最后一个线形的图例

示例代码：

clc
clear
close all
%% 原始数据
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dt=0.01;
t_end=10;
t1=dt:dt:t_end;

tmd1=1;%透明度
tmd2=0.3;%透明度

qwe=[-100,-76.5081172519901,-42.7734654337302,-29.7248879193613,0,30.7960215203940,45.4527832067873,81.7379795916058,100];
%% 图
figure(5)
p=fill([t1 t1(end:-1:1)],[t1*0+qwe(1) t1*0+qwe(2)],'r');
p.FaceColor = [1 0.8 0.8]; %设置填充颜色
p.EdgeColor = 'none'; %设置边缘填充颜色
p.FaceAlpha=tmd1;
hold on
p=fill([t1 t1(end:-1:1)],[t1*0+qwe(2) t1*0+qwe(3)],'r');
p.FaceColor = [1 0.8 0.8]; %设置填充颜色
p.EdgeColor = 'none'; %设置边缘填充颜色
p.FaceAlpha=tmd2;
hold on
p=fill([t1 t1(end:-1:1)],[t1*0+qwe(3) t1*0+qwe(4)],'r');
p.FaceColor = [0.93, 0.69, 0.13]; %设置填充颜色
p.EdgeColor = 'none'; %设置边缘填充颜色
p.FaceAlpha=tmd1;
hold on
p=fill([t1 t1(end:-1:1)],[t1*0+qwe(4) t1*0+qwe(5)],'r');
p.FaceColor = [0.93, 0.69, 0.13]; %设置填充颜色
p.EdgeColor = 'none'; %设置边缘填充颜色
p.FaceAlpha=tmd2;
hold on
p=fill([t1 t1(end:-1:1)],[t1*0+qwe(5) t1*0+qwe(6)],'r');
p.FaceColor = [0.93, 0.69, 0.13]; %设置填充颜色
p.EdgeColor = 'none'; %设置边缘填充颜色
p.FaceAlpha=tmd1;
hold on
p=fill([t1 t1(end:-1:1)],[t1*0+qwe(6) t1*0+qwe(7)],'r');
p.FaceColor = [0.93, 0.69, 0.13]; %设置填充颜色
p.EdgeColor = 'none'; %设置边缘填充颜色
p.FaceAlpha=tmd2;
hold on
p=fill([t1 t1(end:-1:1)],[t1*0+qwe(7) t1*0+qwe(8)],'r');
p.FaceColor = [1 0.8 0.8]; %设置填充颜色
p.EdgeColor = 'none'; %设置边缘填充颜色
p.FaceAlpha=tmd1;
hold on
p=fill([t1 t1(end:-1:1)],[t1*0+qwe(8) t1*0+qwe(9)],'r');
p.FaceColor = [1 0.8 0.8]; %设置填充颜色
p.EdgeColor = 'none'; %设置边缘填充颜色
p.FaceAlpha=tmd2;
hold on
plot(t1,data,'*-','Color', [0, 0.5, 1],'markersize',5,'LineWidth',1)

ylim([-80,80])
yticks([-80,-40,0,40,80])
xlabel('x')
ylabel('data')

h = findobj(gca, 'Type', 'line'); % 找到所有线形对象
lastLineHandle = h(end); % 获取最后一个线形对象
legend(lastLineHandle, 'Data'); % 只显示最后一个线形的图例

ZT=30;%字体30号
set(gca,'FontSize',ZT);
aaa=2;
set(gcf,'unit','centimeters','position',[2 2 16*aaa 9*aaa]);
set(gca,"FontName","Times New Roman","FontSize",ZT,"LineWidth",2);

效果：