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Bug 3203 - ft_headmodel_localspheres incompatible with spatial projectors ?
| Status | CLOSED FIXED |
| Reported | 2016-11-04 21:24:00 +0100 |
| Modified | 2017-03-14 12:48:31 +0100 |
| Product: | FieldTrip |
| Component: | forward |
| Version: | unspecified |
| Hardware: | PC |
| Operating System: | Windows |
| Importance: | P5 major |
| Assigned to: | Jan-Mathijs Schoffelen |
| URL: | |
| Tags: | |
| Depends on: | |
| Blocks: | |
| See also: |
François Tadel - 2016-11-04 21:24:35 +0100
Hello, I'm writing a Brainstorm wrapper for ft_prepare_headmodel. It works well for singlesphere and singleshell, but I don't understand what I'm supposed to do with localspheres. I'm passing a grad structure with a .tra matrix that includes multiple transformation matrices (the CTF 3rd order gradient compensation + a few SSP projectors). By construction this .tra matrix has almost no zero values. In this configuration, line 138 behaves in really weird way: https://github.com/fieldtrip/fieldtrip/blob/master/forward/ft_headmodel_localspheres.m#L138 Am I missing something, or is it that this function is incompatible with this type of input? Thanks Francois
Jan-Mathijs Schoffelen - 2016-11-29 09:14:48 +0100
It looks as if the code for the localspheres has not evolved along with the rest of the code-base. Once upon a time, we only used unbalanced gradiometer definitions, and this particular line worked well to identify the coils that contribute to a particular gradiometer. I suspect that with the current state of the code, we may need to use chanori and chanpos instead.