Categorical encoding of decision variables in orbitofrontal cortex
Fig 5
Silhouette comparison of spherical k-means clustering for different numbers of clusters on synthetic data.
Synthetic data were either categorical (top row) simulated like in Fig 3 or non-categorical consisting of 400 samples uniformly distributed over the unit hyper-sphere (bottom row). For each data set, the number of clusters was varied between 2 and 8 (A-G) and (H-N) respectively. Each color corresponds to one cluster.