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d["Second Line"] = +d["Second Line"];
});
x.domain(d3.extent(data, function(d) { return d.date; }));
y.domain([
d3.min(data, function(d) { return Math.min(d["First Line"], d["Second Line"]); }),
d3.max(data, function(d) { return Math.max(d["First Line"], d["Second Line"]); })
]);
svg.datum(data);
svg.append("clipPath")
.attr("id", "clip-above")
.append("path")
.attr("d", area.y0(height));
svg.append("clipPath")
.attr("id", "clip-below")
.append("path")
.attr("d", area.y0(0));
svg.append("path")
.attr("class", "area below")
.attr("clip-path", "url(#clip-below)")
.attr("d", area.y0(function(d) { return y(d["Second Line"]); }));
svg.append("path")
.attr("class", "area above")
.attr("clip-path", "url(#clip-above)")
.attr("d", area);
svg.append("path")
.attr("class", "line")
.attr("d", line.y0(height));
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Temperature (ºF)");
body {
font: 10px sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.x.axis path {
/*display: none;*/
}
.area.below {
fill: rgb(252,141,89);
stroke: #000;
stroke-width: 1px;
}
.area.above {
fill: rgb(145,207,96);
stroke: #000;
stroke-width: 1px;
}
.line {
fill: #ccc;
stroke: #000;
stroke-width: 0.5px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
<div id="chart"></div>
