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ptvans/.block

Last active December 4, 2016 05:29
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d3.js nest example
Raw
.block
license: mit
Raw
index.html
<!DOCTYPE html>
<head>
<meta charset="utf-8">
<script src="https://d3js.org/d3.v4.min.js"></script>
<style>
body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
.categories {
height: 10;
width: 20;
x: 10;
y: 10;
}
</style>
</head>
<body>
<script>
var width = 900;
var height = 650;
var x = d3.scaleBand()
.rangeRound([0, width])
.padding(0.1)
.align(0.1);
var y = d3.scaleLinear()
.rangeRound([height, 0]);
var z = d3.scaleOrdinal()
.range(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00"]);
var transactions = [
{amount: 2700.00, vendor: "check", date: "3/01/2016", category: "rent"},
{amount: 48.87, vendor: "oreillys autoparts", date: "3/21/2016", category: "auto parts"},
{amount: 68.43, vendor: "Van Kleef", date: "4/04/2016", category: "bars"},
{amount: 22.43, vendor: "pub", date: "4/04/2016", category: "bars"},
{amount: 18.87, vendor: "oreillys autoparts", date: "5/21/2016", category: "auto parts"}
];
//assign months
var parseDate = d3.timeParse("%m/%d/%Y");
var formatMonth = d3.timeFormat("%m-%y");
transactions.forEach(function(d) {
d.date = +parseDate(d.date);
var month = formatMonth(d.date);
d.month = month;
});
//group by month and then category
var byCategory = d3.nest()
.key(function(d) { return d.month; })
.key(function(d) { return d.category; })
.entries(transactions);
//console.log(transactions);
//console.log(byCategory);
//create a rollup total for each category
var sumCategory = d3.nest()
.key(function(d) { return d.month; })
.key(function(d) { return d.category; })
.rollup(function(leaves) {
return {
"total": d3.sum(leaves, function(d) { return parseFloat(d.amount); })
}
})
.entries(transactions);
console.log(sumCategory);
// Set the domains
x.domain([d3.min(sumCategory, function(d) { return d.month; }),d3.max(sumCategory, function(d) { return d.month; })]);
//x domain map to month
y.domain([0, d3.max(sumCategory, function(d) { return d.amount; })]).nice();
//y domain needs to map to amount by month
z.domain(function(d) { return d.category; });
//z domain needs to map to categories
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
g = svg.append("g");
g.selectAll(".categories")
.data(byCategory)
.enter().append("rect")
.attr("class", "categories")
.attr("fill", function(d) { return z(d.key); })
.attr("x", 6)
.attr("y", 20)
.attr("height", 20)
.attr("width", 40)
g.selectAll("rect")
.data(byCategory)
.enter().append("rect")
.attr("fill", function(d) { return z(d.key); })
.attr("x", function(d) { return x(d.month); })
.attr("y", function(d) { return y(d[1]); })
.attr("height", function(d) { return y(d[0]) - y(d[1]); })
.attr("width", x.bandwidth());
var testMap = d3.values(sumCategory).map(function(d) { return d.key; })
console.log(testMap);
g.selectAll(".bars")
.data(sumCategory)
.enter().append("rect")
.attr("class", "bars")
.attr("x", function(d) { return y(d); })
.attr("y", function(d) { return y(d.key); })
.attr("height", 20)
.attr("width", x.bandwidth())
.attr("fill", "red")
</script>
</body>
Raw
style.css
.categories {
height: 10px;
width: 20px;
}
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