How to draw mean value as shown in picture

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I want to plot the mean value as shown in red line in the attached picture.
Any help or idea is highly appreciated.

Accepted Answer

Image Analyst
Image Analyst on 19 Nov 2021
Another option is sgolayfilt(). It's like movmean() but instead of fitting a line to the moving window you can fit a quadratic. That should help it follow the big peak better an not smooth it out so much. I'd use a frame (window) length that's large and an order of 2 or 3. Experiment around to get what you like.
plot(x, y, 'k-');
smoothY = sgolayfilt(y, 11, 2);
hold on;
plot(x, smoothY, 'r-', 'LineWidth', 3);
  1 Comment
Muhammadhn Muhammadh Khalid
Thanks. Exactly what i was looking for. Was working for higher f and smaller k. sgolayfilt(y, k, f).

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