var biom = new Biom({ id: 'My Biom', matrix_type: 'dense', shape: [2,2], rows: [ {id: 'row1', metadata: {}}, {id: 'row2', metadata: {}} ], columns: [ {id: 'col1', metadata: {}}, {id: 'col2', metadata: {}} ], data: [ [0,1], [2,3] ] });