MATLAB Answers

Sliding window centered at a given point

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Laura petrescu
Laura petrescu on 24 Aug 2019
Commented: Image Analyst on 24 Aug 2019
Hi! I have a signal and I need to create a sliding window of known length (let's say x) but it needs to be centered at a given point (y). Can anyone help me? Thanks!

Answers (1)

Image Analyst
Image Analyst on 24 Aug 2019
Edited: Image Analyst on 24 Aug 2019
What are you doing with signal values inside the sliding window? Taking the mean, std, or something custom? If it's some operation/function of your own invention, you can use nlfilter(). Otherwise maybe the family of mov***() might work, for example movmean(), etc. Or there's a variety of built-in functions, like sgolayfilt(), (which fits data in the window to a polynomial), etc.

  2 Comments

Laura petrescu
Laura petrescu on 24 Aug 2019
I have to extract some time and frequency features, including std, mean, etc
Image Analyst
Image Analyst on 24 Aug 2019
Try movmean(), movstd(), movvar(), movmedian(), stdfilt(), and nlfilt().
For frequency info, try fft(), spectrogram(), periodogram(), and pwelch().

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