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Bug 903 - cfg.numcomponent fails most methods in ft_componentanalysis
| Status | CLOSED FIXED |
| Reported | 2011-08-29 21:28:00 +0200 |
| Modified | 2014-04-10 11:52:57 +0200 |
| Product: | FieldTrip |
| Component: | core |
| Version: | unspecified |
| Hardware: | PC |
| Operating System: | Mac OS |
| Importance: | P1 normal |
| Assigned to: | Eelke Spaak |
| URL: | |
| Tags: | |
| Depends on: | |
| Blocks: | |
| See also: |
Robert Oostenveld - 2011-08-29 21:28:23 +0200
the second output should have one output channel less than the first, see also the test_ft_componentanalysis.m script which replicates the bug cfg = []; cfg.method = 'pca'; comp1f = ft_componentanalysis(cfg, data); cfg.numcomponent = nchan-1; comp1s = ft_componentanalysis(cfg, data);
Jan-Mathijs Schoffelen - 2011-08-30 09:07:08 +0200
Isn't it the other way around? Only dss and pca give n-1 components when requested, the other methods all give n components back.
Jan-Mathijs Schoffelen - 2011-08-30 09:07:57 +0200
I guess the assertion should be done on nchan-1 for the compXs structures, i.e. those which have been computed with numcomponent = nchan -1 ;
Robert Oostenveld - 2011-08-30 09:26:20 +0200
sorry, you are right. There is a copy-and-paste error in the test script and it should be the other way around
Robert Oostenveld - 2011-08-30 09:27:21 +0200
*** Bug 904 has been marked as a duplicate of this bug. ***
Jan-Mathijs Schoffelen - 2011-08-30 09:36:56 +0200
only pca and dss seem to work
Eelke Spaak - 2011-11-10 17:35:39 +0100
For the decomposition methods that support limiting the number of components estimated, I used this option. For the others, ft_componentanalysis now just deletes any extra components above cfg.numcomponent.
Robert Oostenveld - 2011-11-11 11:19:43 +0100
I closed all bugs that were recently resolved.