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2009 May 22
2
Error in FUN with tapply and by
...uot;,"na",110,250,380,520,520 "Round","NonPrefHand","Baseline",0,"S01","na","na",220,360,460,620,620 -------------- I computed some values (times) from the raw data --------------- t_p1=PenDG t_c1=PenUG-PenDG t_p2=PenDS-PenUG t_c2=PenUS-PenDS --------------- And I put those times in a data frame called "times". For each of these times, I want to subtract the average for "Baseline" trials from the average for "Integrated" trials within the "Grip" and "Technique" factors. Cal...