> most ML data is not sparse. As an ML guy I can say that sparse is pretty common in ML. Text data, market basket data, graph Laplacians, adjacency matrix, seq

> most ML data is not sparse. As an ML guy I can say that sparse is pretty common in ML. Text data, market basket data, graph Laplacians, adjacency matrix, sequence fragment data are all rich in sparse matrix computation and storage operations. For a moment I thought the "not" was a typo. Lack of support for sparse matrices often becomes a serious inconvenience in a tool, very happy that TileDB folks have given thought to the sparsity requirement from get-go