Smoothing of noisy data

21 Ansichten (letzte 30 Tage)
Richard Wood
Richard Wood am 21 Mär. 2020
Kommentiert: Image Analyst am 22 Mär. 2020
Hello everyone, I want to smooth my data, which looks like
It is possible to see a trend, more or less. Using smooth(data)
Do you have any advice to improve it?

Akzeptierte Antwort

Image Analyst
Image Analyst am 21 Mär. 2020
You forgot to attach your data. But you can try smoothdata(). It looks like it in turn calls movmean(), movmedian(), sgolayfilt(), or whatever smoothing method you want:
Smoothing method, specified as one of the following:
  • 'movmean' — Moving average over each window of A. This method is useful for reducing periodic trends in data.
  • 'movmedian' — Moving median over each window of A. This method is useful for reducing periodic trends in data when outliers are present.
  • 'gaussian' — Gaussian-weighted moving average over each window of A.
  • 'lowess' — Linear regression over each window of A. This method can be computationally expensive, but results in fewer discontinuities.
  • 'loess' — Quadratic regression over each window of A. This method is slightly more computationally expensive than 'lowess'.
  • 'rlowess' — Robust linear regression over each window of A. This method is a more computationally expensive version of the method 'lowess', but it is more robust to outliers.
  • 'rloess' — Robust quadratic regression over each window of A. This method is a more computationally expensive version of the method 'loess', but it is more robust to outliers.
  • 'sgolay' — Savitzky-Golay filter, which smooths according to a quadratic polynomial that is fitted over each window of A. This method can be more effective than other methods when the data varies rapidly.
  5 Kommentare
Richard Wood
Richard Wood am 22 Mär. 2020
The interactive environment was very helpful. Thank you very much to both of you!
Image Analyst
Image Analyst am 22 Mär. 2020
Looks like a nice tool. It would be nice if it were somehow available for those of us who prefer the traditional editor instead of the live script editor. Like if it were callable from the command line or on the Apps tab of the tool ribbon.

Melden Sie sich an, um zu kommentieren.

Weitere Antworten (0)

Community Treasure Hunt

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

Start Hunting!

Translated by