How to make the color of the filled part transparent

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高祥 袁
高祥 袁 on 21 Nov 2021
Edited: the cyclist on 21 Nov 2021
figure
ax1 = axes;
ax2 = axes;
x=linspace(1,10,10);
y=sin(x);
plot(ax2,x,y,'Marker','o','MarkerSize',10,'MarkerFaceColor','y')
fill(x,y,'r')
I = imread('peppers.png');
imshow(I,'Parent',ax1) % Show the image on ax1
ax2.Color='none';
How to make the color of the filled part transparent so that I can see the full picture

Accepted Answer

the cyclist
the cyclist on 21 Nov 2021
Edited: the cyclist on 21 Nov 2021
Use the FaceAlpha property, with a value near zero:
figure
ax1 = axes;
ax2 = axes;
x=linspace(1,10,10);
y=sin(x);
plot(ax2,x,y,'Marker','o','MarkerSize',10,'MarkerFaceColor','y')
fill(x,y,'r','FaceAlpha',0.2)% <------- SEE THE DIFFERENCE HERE
I = imread('peppers.png');
imshow(I,'Parent',ax1) % Show the image on ax1
ax2.Color='none';

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