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Bug 2067 - No unit conversion in ft_prepare_headmodel
| Status | CLOSED WONTFIX |
| Reported | 2013-03-18 14:47:00 +0100 |
| Modified | 2014-03-12 12:21:36 +0100 |
| Product: | FieldTrip |
| Component: | core |
| Version: | unspecified |
| Hardware: | PC |
| Operating System: | Windows |
| Importance: | P3 normal |
| Assigned to: | Jörn M. Horschig |
| URL: | |
| Tags: | |
| Depends on: | |
| Blocks: | |
| See also: |
- 2013-03-18 14:47:13 +0100
Hi all, I found that in the latest version of FT (@ DCCN "H:\common\matlab\fieldtrip" used today on 18th of March 2013), the function ft_prepare_headmodel doesn't do the automatic conversion from mm to cm for a 'ctf' layout. It says in the tutorial that it should do that, and also in an earlier version of FT ('fieldtrip-20120222') it did do the conversion. Now you end up with sensor locations in cm and brain volume in mm. Best, Erik te Woerd
Robert Oostenveld - 2013-03-18 15:39:46 +0100
Hi Erik Do you have a small script and/or mat file that demonstrates it (and shows your usage)? Thanks
- 2013-03-18 16:12:56 +0100
Created attachment 438 SegmentedMRI (output of ft_volumesegment) This is then the next step (this should do the automatic conversion from mm to cm): % Create head model cfg = []; cfg.method='singleshell'; vol = ft_prepare_headmodel(cfg, segmentedmri);
Jörn M. Horschig - 2013-03-18 16:46:30 +0100
not sure if it should be in 'cm', since units are arbitrary anyways, but imho it would be good to ft_functions return them returned in consistent units. Just in case you did not know, for now you can use ft_convert_units to get the headmodel in 'cm'
Lilla Magyari - 2013-07-23 21:14:28 +0200
Hi all and Robert, No conversation is happening indeed, but I am wondering if it is really a bug. I thought it was due to a new decision on the unit handling in Fieldtrip. I assign this to the joint development user because I won't be around for while. Best, Lilla
Jörn M. Horschig - 2014-01-29 17:02:47 +0100
I'm gonna look into this. Even if this is not a real bug, the code and the documentation on the wiki (tutorial&example script) should be consistent