No FaceAlpha property for area plot
显示 更早的评论
Hi, I would like to draw two area graphs in one plot to overlay each other and have transparent colors. but the area plot library in my Matlab 2014b doesn't have faceAlpha properties.
采纳的回答
Star Strider
2016-3-11
0 个投票
I would use the patch function instead. According to the R2014b documentation for Patch Properties, the patch function does have a 'FaceAlpha' option in the name-value pairs. I will help if you need to re-write your code to make it work with patch.
4 个评论
Elaheh Soltanaghaei
2016-3-11
Thank you for your reply. However, the output of patch function is different with the area. Here is the an example to compare patch and area function for one of my data groups. Basically, I need the area one with one more graph overlay the first one with transparency to see the overlapped areas.
Area Graph:
Patch graph:
Star Strider
2016-3-11
The problem with patch can be fixed, likely easily. The patch function needs to have its areas carefully defined, and sometimes this requires a bit of extra coding. I can help if you attach your data and say what you want to do.
As an interim fix, in the patch call, see if setting both the first and last values of your dependent variable to zero (appending zeros to both ends of the vector) and duplicating the first and last values of your independent variable (the vectors have to be the same lengths) works.
For example:
x = 1:10;
y = [1 2 3 4 5 4 3 0 1 2];
figure(1)
patch(x, y, 'b')
figure(2)
patch([1 x 10], [0 y 0], 'r')
Run this. You will see the difference.
Elaheh Soltanaghaei
2016-3-11
Star Strider
2016-3-11
My pleasure!
更多回答（1 个）
Mike Garrity
2016-3-11
FaceAlpha was added to area in R2015b. So if you upgrade to either that or R2016a, you can do this:
area(rand(1,10),'FaceAlpha',.5)
类别
在 帮助中心 和 File Exchange 中查找有关 Polygons 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
