		[1.3, 1],
			[1.75, 2.5],
			[2.5, 0.5]
		];

		var data4_errors = [0.1, 0.4, 0.2];
		for (var i = 0; i < data4.length; i++) {
			data4_errors[i] = data4[i].concat(data4_errors[i])
		}

		var data = [
			{color: "blue", points: data1_points, data: data1, label: "data1"}, 
			{color: "red",  points: data2_points, data: data2, label: "data2"},
			{color: "green", lines: {show: true}, points: data3_points, data: data3, label: "data3"},
			// bars with errors
			{color: "orange", bars: {show: true, align: "ce