透明绘图

Question

我必须绘制如下两条相互重叠的曲线。如何使重叠区域透明，以便下部曲线可见？在重叠区域，我目前只能看到顶部曲线。

x=0:0.01:2*pi;                  %#initialize x array
y1=sin(x);                      %#create first curve
y2=sin(x)+.5;                   %#create second curve
X=[x,fliplr(x)];                %#create continuous x value array for plotting
Y=[y1,fliplr(y2)];              %#create y values for out and then back
fill(X,Y,'b');                  %#plot filled area
%*****************
hold on
x=0:0.01:2*pi;                  %#initialize x array
y1=sin(2.*x);                   %#create first curve
y2=sin(2.*x)+.5;                %#create second curve
X=[x,fliplr(x)];                %#create continuous x value array for plotting
Y=[y1,fliplr(y2)];              %#create y values for out and then back
fill(X,Y,'b');                  %#plot filled area

Answer 1

将您的最后一条命令 fill(X,Y,'b'); 替换为：

h = fill(X,Y,'b');

获取它创建的补丁对象的句柄。然后输入：

set(h, 'FaceAlpha', 0.5)

这能满足你的需要吗？