This JSON format as two hashes: "rows" and "columns". o_O
http://biom-format.org/documentation/format_versions/biom-1.0.html#minimal-sparse-otu-table
This JSON format as two hashes: "rows" and "columns". o_O
http://biom-format.org/documentation/format_versions/biom-1.0.html#minimal-sparse-otu-table