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Bug 3182 - check averaging and keeptrials in freqanalysis+freqdescriptives
| Status | CLOSED INVALID |
| Reported | 2016-09-14 15:46:00 +0200 |
| Modified | 2019-08-10 12:33:26 +0200 |
| Product: | FieldTrip |
| Component: | core |
| Version: | unspecified |
| Hardware: | PC |
| Operating System: | Mac OS |
| Importance: | P5 normal |
| Assigned to: | |
| URL: | |
| Tags: | |
| Depends on: | |
| Blocks: | |
| See also: |
Robert Oostenveld - 2016-09-14 15:46:57 +0200
Cecilia reported this by email: I am doing a frequency analysis (induced gamma activity) on MEG data and I was wondering whether it makes a difference to select cfg. keeptrials = 'yes' in the analysis. What I thought is that keeping the trials in ft_freqanalysis and then averaging using ft_freqdescriptives would lead to the same result as using cfg.keeptrials= 'no'. Am I correct? I am getting quite different TFRs representation actually, especially in the baseline. (by using cfg.keeptrials='no' , TFRs are somewhat "cleaner")..
Robert Oostenveld - 2016-09-14 15:49:02 +0200
(In reply to Robert Oostenveld from comment #0) I suspect it is due to her plotting it differently, and/or baseline correcting it differently. But let's check to be suyre
Robert Oostenveld - 2016-09-14 16:05:41 +0200
I tested it, there is no difference between keeptrials=yes or no. ip-145-116-189-182> git commit test_bug3182.m [master 40a3b1a] ENH - added test script for http://bugzilla.fieldtriptoolbox.org/show_bug.cgi?id=3182, no problem detected 1 file changed, 44 insertions(+) create mode 100644 test/test_bug3182.m ip-145-116-189-182> git push Counting objects: 8, done. Delta compression using up to 4 threads. Compressing objects: 100% (8/8), done. Writing objects: 100% (8/8), 1.17 KiB | 0 bytes/s, done. Total 8 (delta 5), reused 0 (delta 0) remote: Resolving deltas: 100% (5/5), completed with 3 local objects. To git@github.com:robertoostenveld/fieldtrip.git fd92fd2..40a3b1a master -> master