Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
faq:how_does_the_filter_padding_in_preprocessing_work [2011/09/02 17:51]
lilla
faq:how_does_the_filter_padding_in_preprocessing_work [2017/08/17 11:21] (current)
Line 7: Line 7:
 Padding the data can be beneficial, since the edge artifacts that are typically seen after filtering will be in the padding and not in the segment of interest. Padding is also relevant for DFT filtering of the 50Hz line noise artifact: long padding ensures a higher frequency resolution for the DFT filter, causing a narrower notch to be removed from the data. This is especially relevant for multi-taper frequency analyses. Padding the data can be beneficial, since the edge artifacts that are typically seen after filtering will be in the padding and not in the segment of interest. Padding is also relevant for DFT filtering of the 50Hz line noise artifact: long padding ensures a higher frequency resolution for the DFT filter, causing a narrower notch to be removed from the data. This is especially relevant for multi-taper frequency analyses.
  
 +See also this [[/​faq/​how_can_i_interpret_the_different_types_of_padding_that_i_find_when_dealing_with_artifacts|FAQ]] on how the different types of padding are to be interpreted in relation to artefact detection.