Smoothing just part of the data

2 views (last 30 days)
I have a 5000x1 array. I'd like to smooth the data from 500:1500 with the function smooth. For now i have created another array 1000x1 with the smoothed data and then overwritten the 500:1500 data in the original array, but is there an easier way to do it?

Accepted Answer

KALYAN ACHARJYA
KALYAN ACHARJYA on 11 Apr 2022
Edited: KALYAN ACHARJYA on 11 Apr 2022
One way
data=rand(5000,1);
data_smooth=data; % Just copy to retain original data
data_ex=smoothdata(data(500:1500));
data_smooth(500:1500)=data_ex;
You can plot both that data, data & data_smooth to see the difference.
  1 Comment
KuriGohan
KuriGohan on 12 Apr 2022
yes, thats similar to how i do it now. I just didn't copy to retain original data, i'll add that too. Thank you!

Sign in to comment.

More Answers (1)

John D'Errico
John D'Errico on 11 Apr 2022
Um, No. Why should there be?
In fact, extracting the part you want to smooth, and then overwriting that smoothed fragment back into the array seems crystal clear, easy to implement, easy to debug, easy to read, and as fast an any other scheme could be. So why should there be another way?
  2 Comments
John D'Errico
John D'Errico on 12 Apr 2022
So write a little function that does it for you, extracting that segment only, then replacing it after the smooth. Now you can call it as often as you wish. Write the function to take data as an argument, and a second argument that indicates the specific interval. Have it do the smooth and replacement.
This is how MATLAB works. If you want something there is absolutely no general need for, then nobody will have writtten something as specific as this. In that case, you write a function that does it for you.

Sign in to comment.

Products


Release

R2021a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by