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Bug 792 - ft_preproc_polyremoval gives round off problems
| Status | CLOSED FIXED |
| Reported | 2011-07-01 09:35:00 +0200 |
| Modified | 2011-07-06 16:38:26 +0200 |
| Product: | FieldTrip |
| Component: | core |
| Version: | unspecified |
| Hardware: | PC |
| Operating System: | Mac OS |
| Importance: | P1 normal |
| Assigned to: | Jan-Mathijs Schoffelen |
| URL: | |
| Tags: | |
| Depends on: | |
| Blocks: | |
| See also: |
Jan-Mathijs Schoffelen - 2011-07-01 09:35:54 +0200
when removing a simple linear trend (see faq why does my tfr look strange part II) the result is not a flat line, but has values ~10e-12. This is caused by the fact that the regression is being done by the '\' operator. I suggest to replace this by the numerically more stable (I tested it on the example above) inv(x'x)x