linedata = [
{hour: 0, value: 8, sensor: "A"},
{hour: 0, value: 6, sensor: "B"},
{hour: 1, value: 7, sensor: "A"},
{hour: 1, value: 5, sensor: "B"},
{hour: 2, value: 3, sensor: "A"},
{hour: 2, value: 0, sensor: "B"},
{hour: 3, value: 9, sensor: "A"},
{hour: 3, value: 2, sensor: "B"}
]