Created
March 20, 2017 03:32
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Scatterplot exercise step 6
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// don't want dots overlapping axis, so add in buffer to data domain | |
xScale.domain([d3.min(data, xValue)-1, d3.max(data, xValue)+1]); | |
yScale.domain([d3.min(data, yValue)-1, d3.max(data, yValue)+1]); | |
// x-axis | |
svg.append("g") | |
.attr("class", "x axis") | |
.attr("transform", "translate(0," + height + ")") | |
.call(xAxis) | |
.append("text") | |
.attr("class", "label") | |
.attr("x", width) | |
.attr("y", -6) | |
.style("text-anchor", "end") | |
.text("Calories"); | |
// y-axis | |
svg.append("g") | |
.attr("class", "y axis") | |
.call(yAxis) | |
.append("text") | |
.attr("class", "label") | |
.attr("transform", "rotate(-90)") | |
.attr("y", 6) | |
.attr("dy", ".71em") | |
.style("text-anchor", "end") | |
.text("Protein (g)"); | |
// draw dots | |
svg.selectAll(".dot") | |
.data(data) | |
.enter().append("circle") | |
.attr("class", "dot") | |
.attr("r", 3.5) | |
.attr("cx", xMap) | |
.attr("cy", yMap) | |
.style("fill", function(d) { return color(cValue(d));}) | |
.on("mouseover", function(d) { | |
tooltip.transition() | |
.duration(200) | |
.style("opacity", .9); | |
tooltip.html(d["Cereal Name"] + "<br/> (" + xValue(d) | |
+ ", " + yValue(d) + ")") | |
.style("left", (d3.event.pageX + 5) + "px") | |
.style("top", (d3.event.pageY - 28) + "px"); | |
}) | |
.on("mouseout", function(d) { | |
tooltip.transition() | |
.duration(500) | |
.style("opacity", 0); | |
}); |
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