thanks.js

/* data= 
[
	{
		"name":"asdf",
		"values":[{"date":1398206589000,"temperature":94.9},{"date":1398206592000,"temperature":63.9},{"date":1398206595000,"temperature":77.6},{"date":1398206598000,"temperature":46.8}]
	},{
		"name":"sensor 2",
		"values":[{"date":1398206589000,"temperature":82.8},{"date":1398206592000,"temperature":99.5},{"date":1398206595000,"temperature":5.6},{"date":1398206598000,"temperature":65.3},{"date":1398206601000,"temperature":35.5},{"date":1398206604000,"temperature":65.6},{"date":1398206607000,"temperature":24.1},{"date":1398206610000,"temperature":72.4},{"date":1398206613000,"temperature":35.5},{"date":1398206616000,"temperature":21.2},{"date":1398206619000,"temperature":46.6},{"date":1398206622000,"temperature":13.5},{"date":1398206625000,"temperature":99.7},{"date":1398206628000,"temperature":2.5},{"date":1398206631000,"temperature":73.3},{"date":1398206634000,"temperature":3.8},{"date":1398206637000,"temperature":3},{"date":1398206640000,"temperature":75.4},{"date":1398206643000,"temperature":41.4},{"date":1398206646000,"temperature":79.3},{"date":1398206649000,"temperature":96.2},{"date":1398206652000,"temperature":40.3},{"date":1398206655000,"temperature":71.1},{"date":1398206658000,"temperature":92.1}]
	}
]
*/
var hackyFill = function(d,i) {
	for (var j = 0; j < data.length; j++) {
		
		if (data[j].values[i].date == d.date && data[j].values[i].temperature == d.temperature) {
			return color(data[j].name);
		}
	}
}

var sensor = svg.selectAll(".sensor")
      .data(data)
    .enter().append("g")
      .attr("class", "sensor");

  sensor.append("path")
      .attr("class", "line")
      .attr("d", function(d) { return line(d.values); })
      .style("stroke", function(d) { return color(d.name); });

  sensor.selectAll("circle")
      .data(function(d) {return d.values;})
    .enter().append("circle")
      .attr("class","dot")
      .attr("r", 3.5)
      .attr("cx", function(d) { return x(d.date); })
      .attr("cy", function(d) { return y(d.temperature); })
      .style("fill", function(d,i) { return hackyFill(d,i);});