Maxfilter Version 2.2

Look here for a brief introduction and literature about Maxfilter and its main feature, the Signal Space Separation method.

Example

Version 2.2. is currently the default on our 64-bit machines (see below for more details).

This command will apply Maxfilter including Signal Space Separation (SSS), its temporal extension (ST), and movement compensation.

maxfilter  -f input_file.fif  -o output_file.fif  -st  -origin 0 0 45  -frame head  -autobad on  -movecomp  -format short  -force 

For more information on these and other options, see the Maxfilter 2.2 Manual.

Known problems and bugs

Maxfilter 2.2. cannot do downsampling and filtering at the same time as movement compensation. You will therefore have to run those in a separate step, e.g.

maxfilter  -f input_file.fif  -o output_file.fif  -ds 4  -lpfilt 40

Diagnostics

You can get information about movement parameters using these scripts to analyse maxfilter output.

How to run Maxfilter at the CBSU

Via the CBU load balancing scripts

maxfilter - defaults to running version 2.2 on l43-l59

maxfilter-2.0 - runs version 2.0 on l24-l42

maxfilter-2.1 - runs v 2.1 on l43-l59

maxfilter-2.2 - runs v 2.2 on l43-l59

maxfilter_gui – runs using maxfilter-2.2 on l43-l59

To run without loadbalancing (i.e. on the current machine)

/neuro/bin/util/maxfilter – will run the default version of maxfilter for that machine (v2.0 on l24-42, v2.2 on l43-59)

The higher numbered machines also have the commands:

/neuro/bin/util/maxfilter-2.1

/neuro/bin/util/maxfilter-2.2

Running maxfilter this way does have the potential pitfall that the command /neuro/bin/util/maxfilter will run different versions depending on which machine you’re on.

By calling the actual binary files

/neuro/bin/util/<machine architecture>/maxfilter

/neuro/bin/util/<machine architecture>/maxfilter-2.1

/neuro/bin/util/<machine architecture>/maxfilter-2.2