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hilbertDs
hilbertDs
computes the Hilbert Transform of the channels in a dataset. If you use a narrow band, this will approximate the envelope of the data, which is one way of estimating the instantaneous power. Another way is rmspowerDs
.
Download hilbertDs. Linux x86 binary, build 5.0-linux-20051012. Email me for source (but you need the VSM/CTF dataset libraries to build it).
chmod +x hilbertDs
, and move to your bin
directory.
hilbertDs [options] $ds $newds
You will most likely want to use the -band lo hi
option. Other options are the same as for newDs2
. If you are looking at virtual channels produced by SAM, remember to use the same band and time window that you used for the covariance. The -excludeMEG
option is also useful in that case.
Generally, you'll run hilbertDs
on unaveraged data, and then average the Hilbert transformed data.