ft_appenddata and denoise_pca causing problems

[Stephan Moratti]

Dear Luisa & Jan-Mathijs

This sounds like a similar problem that I had with 4D data using the
implemented noise reduction algorithm that offers 4D. When there was a very
big noise (like the subject coughing or moving a lot), the noise reduction
resulted in noiser data. I guess this has to do with the global weights
calculation. My solution was to inspect the data if there were data traces
of exceptionally big noise, then I used the 4D tool "mute" where you can set
data traces to zero with a smoothing function for the edges. Doing so, after
noise reduction the data was fine! Maybe something like this can solve your
problem, although I am not sure if it is related to your problem.

Best,

Stephan

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