How to make contourf image semitransparent?
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I am using contourf to plot a 2D image in jet like below. Now I plan to make it semitransparent, therefore I may add some more lines. I tried all solutions searched online. Seems not working. Would anyone help me out?
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1085710/image.png)
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Bhanu Prakash
am 11 Jul. 2024
Bearbeitet: Adam Danz
am 12 Jul. 2024
Hi,
Starting in R2022b, to control the transparency of a 'contourf' plot, you can use the 'FaceAlpha' property in MATLAB. Here is an sample code for the same:
Z = peaks;
[M,c] = contourf(Z);
The range of 'FaceAlpha' is [0,1] with the deafult value being '1':
>> c.FaceAlpha
ans =
1
If you want to reduce the transparency, you can decrease the value of 'FaceAlpha' as follows:
c.FaceAlpha=0.3
Hope this helps!
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