I am using Neuromag VectorView MEG - SQUID system. Not able to complete the Instalation of MNE in Mac system.
Through TEAM VIEWER / Skype, sharing the SCREEN .
I have completed installing MNE , but not able to see User Inter faces. Kindly some one can
Help through TC . Need your reply.
Dr. Purushothaman
Brain Cell molecule Spectra nano Analyser.
Hello,
I am trying to replicate an EEG study that used Matlab with mne. This study reported to have used a bandpass two-way least-squares finite impulse response filter for power analyses.
If I understand the MNE documentation correctly, in mne the forward-backward filtering option is only possible with iir filters?
Is this correct or is the forward-backward option also implemented in the FIR filter.
Thank you,
Dirk van Moorselaar
You can use the IIR code -- a FIR filter can be expressed as an IIR filter
with a [1] for the denominator coefficient (i.e., a=[1.]).
If you need the FIR coefficients to be identical and want to stay in
Python, you'll have to wait until `firls` is implemented in SciPy:
https://github.com/scipy/scipy/pull/5989
In the meantime, though, you could compute the filter coefficients in
MATLAB, save them, and load them in Python. Also, make sure they used
forward-backward (acausal) filtering, and not one-pass (causal) FIR
filtering, as they will produce different results.
Eric
Using the iir code for fir filtering would work, but it would miss out on
all the speed benefits of fir filtering, especially when doing zero phase
(i.e. forward backward). Should we expose _overlap_add_filter?
Perhaps. We can discuss that on GitHub if people are interested in seeing
it.
Eric