Fig. 3: Principal components analysis.
a Cumulative percentage of variance explained vs. number of principal components. PCA is performed separately for each task and subject. The curves are averaged across eight subjects for grasp and across three subjects for ASL. Error bars denote the standard error of the mean. b Visualization of example PCs. For each task, we show the 1st and the 20th PCs (in terms of variance explained). The 20th PC accounts for less than one percent of the variance.
