If you want the area between ‘abb_per’ and 100 filled, use the patch function.
Try this:
figure
patch([n fliplr(n)],[abb_per; ones(size(abb_per))*100].','b')
producing:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/342445/image.png)
.
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