Translations:Resampling/7/en

Impact of resampling

However, the resampled timestamps are a bit less accurate. For example, the first change from value 3 to 1 by participant A did NOT occur at timecode r1 as the value change in the resampled data might suggest, but actually slightly earlier at t1. But because t1 doesn’t match the equidistant resampling grid, r1 is the first resampled timestamp that reflects the change. The smaller the resampling interval ∆t, the smaller the mean time deviation between the original and the resampled timestamps. Last but not least, resampled data files are way bigger than the raw data. The Raw data in figure A needs only 8 time/participant/value-rows to store the event information, while the resampled data needs 16 of these rows. In fact, resampled data stores a lot of redundant information, even if there is no user interaction at all. The smaller the resampling interval ∆t, the bigger the amount of redundant information.