rna_cluster From: https://medium.com/@sergeykolchenko/machine-learning-meets-biology-once-again-or-single-cell-rna-sequencing-as-a-field-for-2be24f9108dd Data source http://cf.10xgenomics.com/samples/cell-exp/3.0.0/pbmc_10k_protein_v3/pbmc_10k_protein_v3_filtered_feature_bc_matrix.tar.gz