question: returns the number of columns in this data box . concode_field_sep long serialVersionUID concode_elem_sep double[][] data concode_field_sep BoxDataSet serializableInstance concode_elem_sep void set concode_elem_sep int numRows concode_elem_sep DataBox like concode_elem_sep Number get concode_elem_sep double[][] getVariableVectors concode_elem_sep DataBox copy
target: int function ( ) { return data . length ; }