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Removing long duration drift

ksharma-2
1-Newbie

Removing long duration drift

Can anyone help me how to remove the drift (long duration) from the cyclic data as below? If you have a function for this one, it will be greatly appreciated.

Regards

data with long duration drift.JPG

1 REPLY 1
LucMeekes
23-Emerald III
(To:ksharma-2)

Essentially you need a (digital) high-pass filter, something like:

This filter takes X as the input data (array) and tau as a suitably chosen constant. In your case you'll have to try out what gives you best results.

To show its operation, suppose this is your input data:

Then filtering does this:

Success!
Luc

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