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Bug 3200 - grad structure not correctly updated after ICA for Elekta neuromag data
| Status | NEW |
| Reported | 2016-11-03 09:39:00 +0100 |
| Modified | 2016-11-03 11:33:27 +0100 |
| Product: | FieldTrip |
| Component: | preproc |
| Version: | unspecified |
| Hardware: | PC |
| Operating System: | Windows |
| Importance: | P5 normal |
| Assigned to: | Robert Oostenveld |
| URL: | |
| Tags: | |
| Depends on: | |
| Blocks: | |
| See also: |
Weiyong Xu - 2016-11-03 09:39:22 +0100
Hi, I am using ICA(first PCA) to remove eye blinks for neuromag data. However, when I checked the data structure after ICA, the channel type and channel unit information were not kept. then I did ft_rejectvisual, and the channel type and channel unit were added again, but with all the 306 channels having values of 'megmag' and all the channel unit 'T'. Before ICA, the grad structure has 102 'megmag' and 204 'megplanar' for channel type, and 102 'T' and 204 'T/m' for channel unit. I am wondering if this would affect the results for ft_prepare_leadfield and later the source analysis?
Weiyong Xu - 2016-11-03 09:43:43 +0100
You can find the test data and script at: https://www.dropbox.com/sh/ia1dnowyg4xkouf/AAByyBTHJMh_V0iEmUmAsFNqa?dl=0