English: Supplementary movie 3. The jPCA projections as a function of time. The movie contains clips for four datasets:

monkey B, monkey J3, monkey N, and monkey N-array. Time is 1/8th real time and starts just as preparatory activity is giving way to movement-epoch activity. The projections differ slightly from those in figure 3 of the main text for two reasons. First, they are based on more time. Second, to allow jPCA to best isolate the plane that worked well across a broad range of times, analysis was based on the top 10 PCs. (The true dimensionality of the

data is higher still, but we wished to remain modestly conservative).