How can I remove noise from my graph?

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John Nosh
John Nosh on 22 Sep 2017
Answered: Image Analyst on 22 Sep 2017
I recently conducted an experiment involving water oscillations and I have a lot of noise. What are some methods to remove it? Thank you for your time.

Answers (2)

Christoph F.
Christoph F. on 22 Sep 2017
The most straightforward option is using a filter to remove the noise. This works if the noise has a different spectral content than the signal (e.g. signal is bandlimited, noise is white -> a lowpass filter can be used to reduce the amount of noise).
Functions for digital filter design and application can be found in the signal processing toolbox.

Image Analyst
Image Analyst on 22 Sep 2017
For 1-D signals, you might try sgolayfilt() or movmean() or smooth(). For 2-D signals (images) see https://users.soe.ucsc.edu/~milanfar/publications/journal/ModernTour.pdf

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