@Test
public void testTo2dArray() throws Exception {

  Table table = Table.read().csv("../data/tornadoes_1950-2014.csv");
  TableSliceGroup tableSliceGroup = table.splitOn("Scale");
  int columnNuumber = table.columnIndex("Injuries");
  DoubleArrays.to2dArray(tableSliceGroup, columnNuumber);
}