d3 Bar Chart append text to bar
Question
I've followed the tutorial to make a bar chart from Scott Murray from alignedleft. I'm having problem with my dataset and adding the dataset to a bar as text.
The image below: 1 bar chart: from the tutorial , 2nd bar chart: how I want to display the text.
Here's my code so far:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Tutorial d3 bar chart!</title>
<script type="text/javascript" src="d3/d3.v3.js"></script>
</head>
<body>
<script type="text/javascript">
//Width and height
var w = 500;
var h = 100;
var i = 0;
var barPadding = 1;
var dataset = [
{key:"Department1", value:6234490},
{key:"Department 2", value:9700},
{key:"Department 3", value:2954},
];
//Width and height
var w = 500;
var h = 100;
var barPadding = 1;
//Create SVG element
var svg = d3.select("body")
.append("svg")
.attr("width", w)
.attr("height", h);
svg.selectAll("rect")
.data(dataset)
.enter()
.append("rect")
.attr("x", function(d, i) {
return i * (w / dataset.length);
})
.attr("y", function(d) {
return h - (d * 4);
})
.attr("width", w / dataset.length - barPadding)
.attr("height", function(d) {
return d * 4;
})
.attr("fill", function(d) {
return "rgb(0, 0, " + (d * 10) + ")";
});
svg.selectAll("text")
.data(dataset)
.enter()
.append("text")
.text(function(d) {
for(int i = 0; i < dataset.length; i++){
return d[i].key;
}
})
.attr("text-anchor", "middle")
.attr("x", function(d, i) {
return i * (w / dataset.length) + (w / dataset.length - barPadding) / 2;
})
.attr("y", function(d) {
return h - (d * 4) + 14;
})
.attr("font-family", "sans-serif")
.attr("font-size", "11px")
.attr("fill", "white");
</script>
</body>
</html>
I've tried to add the text in this part:
svg.selectAll("text")
.data(dataset)
.enter()
.append("text")
.text(function(d) {
for(int i = 0; i < dataset.length; i++){
return d[i].key;
}
})
But that just gives me this error:
I hope you guys can help me out.
2 answers
solution1
2 2015-06-11 19:01:15
尝试将int更改为var，javascript中不存在int。
solution2
0 2015-06-11 18:31:59
Every function in d3js provides access to data and the index. Just use this
svg.selectAll("text")
.data(dataset)
.enter()
.append("text")
.text(function(d){return d.key;}
})
EDIT
svg.selectAll("g")
.data(dataset)
.enter()
.append("g")
.append("rect")
.attr("x", function(d, i) {
return i * (w / dataset.length);
})
.attr("y", function(d) {
return h - (d * 4);
})
.attr("width", w / dataset.length - barPadding)
.attr("height", function(d) {
return d * 4;
})
.attr("fill", function(d) {
return "rgb(0, 0, " + (d * 10) + ")";
})
.append("text")
.text(function(d) {
return d.key;
})
.attr("text-anchor", "middle")
.attr("x", function(d, i) {
return i * (w / dataset.length) + (w / dataset.length - barPadding) / 2;
})
.attr("y", function(d) {
return h - (d * 4) + 14;
})
.attr("font-family", "sans-serif")
.attr("font-size", "11px")
.attr("fill", "white");
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