Nature Reviews Genetics (2019) https://doi.org/10.1038/s41576-018-0088-9 Published online 07 January 2019

During typesetting of this article, errors were inadvertently introduced to the hyperlinked URLs of some of the clustering tools in table 1 (Seurat, CIDR, pcaReduce and mpath), as well as to the numbering of the bold-text annotations in the reference list. The article has now been corrected online. The editors apologize for this error.