Dear Soeren Groettrup,
Re:
> I am dealing with a time series of eeg data and I need to filter them with a
> notch filter. However, I could only find the function notch() in the RTisean
> package. Unfortunately, this function is not implemented yet. Is there
> another package/function in R which performs such a filtering?
The 'signal' package contains many filter functions, such as Butterworth:
butter(n, W, type = c("low", "high", "stop", "pass"),
The "stop" version is probably what you are looking for.
As in a band pass filter, the upper and lower frequencies must be given, as
fraction of the sample frequency (so W is a vector with two values).
Hope this helps,With best wishes,
Franklin
--
Dr. Franklin Bretschneider
Dept of Biology
Utrecht Unversity
Padualaan 8
3584 CH Utrecht
The Netherlands
[email protected]
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