Supplementary Figure 4: Cluster separation in activity space.

Neurons belonging to each pair of clusters are shown in a 2D t-distributed Stochastic Neighbor Embedding (Maaten, L. van der & Hinton, G. Visualizing Data using t-SNE. Journal of Machine Learning Research 9, 2579–2605 (2008)) of the eight dimensional PCA subspace (Supplementary Fig 3c) to show that each cluster is separable from other clusters. Perplexity was set to 100 for this visualization (Scikit-learn tsne function). Sample sizes for each cluster is the same as in Fig. 1j, l.