问题
I am trying to add text to a working Marimekko chart. I understand that adding text to a rect requires that the rect and text need to be in a group. But the code I used as a base already uses a group. That is my main question, but I'd also like to make the x axes display the month rather than a %value. Is this mission impossible for a marimekko chart?
<div id="chart"> </div>
<div id="legend"> </div>
<script>
var width = 800,
height = 500,
margin = 20;
var color = d3.scale.category10();
var x = d3.scale.linear()
.range([0, width - 3 * margin]);
var y = d3.scale.linear()
.range([0, height - 2 * margin]);
var n = d3.format(",d"),
p = d3.format("%");
var svg = d3.select("#chart") .append("svg")
.attr("width", width)
.attr("height", height)
.append("g")
.attr("transform", "translate(" + 2 * margin + "," + margin + ")");
d3.json("/mydrupal/sites/default/d3_files/json/marimekko6.json", function(error,data) {
var offset = 0;
// Nest values by month. We assume each month + cause is unique.
var months = d3.nest()
.key(function(d) {
return d.month;
})
.entries(data);
// Compute the total sum, the per-month sum, and the per-cause offset.
// You can use reduce rather than reduceRight to reverse the ordering.
// We also record a reference to the parent cause for each month.
var sum = months.reduce(function(v, p) {
return (p.offset = v) + (p.sum = p.values.reduceRight(function(v, d) {
d.parent = p;
return (d.offset = v) + d.deaths;
}, 0));
}, 0);
// Add x-axis ticks.
var xtick = svg.selectAll(".x")
.data(x.ticks(10))
.enter().append("g")
.attr("class", "x")
.attr("transform", function(d) {
return "translate(" + x(d) + "," + y(1) + ")";
});
xtick.append("line")
.attr("y2", 6)
.style("stroke", "#000");
xtick.append("text")
.attr("y", 8)
.attr("text-anchor", "middle")
.attr("dy", ".71em")
.text(p);
// Add y-axis ticks.
var ytick = svg.selectAll(".y")
.data(y.ticks(10))
.enter().append("g")
.attr("class", "y")
.attr("transform", function(d) {
return "translate(0," + y(1 - d) + ")";
});
ytick.append("line")
.attr("x1", -6)
.style("stroke", "#000");
ytick.append("text")
.attr("x", -8)
.attr("text-anchor", "end")
.attr("dy", ".35em")
.text(p);
// Add a group for each cause.
var months = svg.selectAll(".month")
.data(months)
.enter().append("g")
.attr("class", "month")
.attr("xlink:title", function(d) { return d.key; })
.attr("transform", function(d) {
return "translate(" + x(d.offset / sum) + ")";
});
// Add a rect for each month.
var causes = months.selectAll (".cause")
.data(function(d) { return d.values; })
.enter().append("a")
.attr("class", "month")
.attr("xlink:title", function(d) { return d.cause + " " + d.parent.key + ": " + n(d.deaths); })
.append("rect")
.attr("y", function(d) {
return y(d.offset / d.parent.sum); })
.attr("height", function(d) {
return y(d.deaths / d.parent.sum); })
.attr("width", function(d) {
return x(d.parent.sum / sum); })
.style("fill", function(d) {
return color(d.cause);
});
});
</script>
回答1:
As noted above:
<!--HTML-->
<p>Marimekko Chart see http://bl.ocks.org/mbostock/1005090</p>
<div id="chart"> </div>
<!--CSS-->
<style type="text/css">body {
font: 10px sans-serif;
}
rect {
stroke: #000;
}
.label {
font-size: 12px;
fill: white;
}
.label2 {
font-size: 14px;
fill: black;
}
svg {
shape-rendering: crispEdges;
}
#chart {
margin-bottom: 20px;
}
</style>
<!--JavaScript-->
<script>
var width = 700,
height = 500,
margin = 20;
var color = d3.scale.category20();
var x = d3.scale.linear()
.range([0, width - 3 * margin]);
var y = d3.scale.linear()
.range([0, height - 2 * margin]);
var n = d3.format(",d"),
p = d3.format("%");
var svg = d3.select("#chart") .append("svg")
.attr("width", width)
.attr("height", height)
.append("g")
.attr("transform", "translate(" + 2 * margin + "," + margin + ")");
d3.json("/mydrupal/sites/default/d3_files/json/marimekko6.json", function(error,data) {
var offset = 0;
// Nest values by month. We assume each month + cause is unique.
var months = d3.nest()
.key(function(d) {
return d.month;
})
.entries(data);
// Compute the total sum, the per-month sum, and the per-cause offset.
// You can use reduce rather than reduceRight to reverse the ordering.
// We also record a reference to the parent cause for each month.
var sum = months.reduce(function(v, p) {
return (p.offset = v) + (p.sum = p.values.reduceRight(function(v, d) {
d.parent = p;
return (d.offset = v) + d.deaths;
}, 0));
}, 0);
// Add a group for each cause.
var months = svg.selectAll(".month")
.data(months)
.enter().append("g")
.attr("class", "month")
.attr("xlink:title", function(d) {
return d.key; })
.attr("transform", function(d) {
return "translate(" + x(d.offset / sum) + ")";
});
// Add a rect for each month.
var causes = months.selectAll (".cause")
.data(function(d) {
return d.values; })
.enter().append("a")
.attr("class", "month")
.attr("xlink:title", function(d) {
return d.cause + " " + d.parent.key + ": " + n(d.deaths); });
causes.append("rect")
.attr("y", function(d) {
return y(d.offset / d.parent.sum); })
.attr("height", function(d) {
return y(d.deaths / d.parent.sum); })
.attr("width", function(d) {
return x(d.parent.sum / sum); })
.style("fill", function(d) {
return color(d.cause);
});
// http://stackoverflow.com/questions/17574621/text-on-each-bar-of-a-stacked-bar-chart-d3-js
causes.append("text")
.text(function(d) {
return d.cause + " " + n(d.deaths);})
.attr("x", 5)
.attr("y", function(d) {
return (y(d.offset / d.parent.sum)+20); })
.attr("class", "label")
;
causes.append("text")
.text(function(d) {
return (" Total: " + d.parent.sum);}) // total
.attr("x", 5)
.attr("y", function(d) {
return 450 })
.attr("class", "label2")
;
causes.append("text")
.text(function(d) {
return d.parent.key;}) // month
.attr("x", 5)
.attr("y", function(d) {
return 480; })
.attr("class", "label2")
;
});
</script>
来源：https://stackoverflow.com/questions/22967298/d3-js-how-do-i-add-text-to-marimekko-chart