jmduke/Makefile

## README.md

      
    Raw
  

              README.md
            
          
    This multi-line chart uses an invisible Voronoi tessellation to handle mouseover; the closest point to the mouse on any line is highlighted. Click the checkbox in the top-right to toggle the visibility of the Voronoi overlay.
Note that because d3.geom.voronoi does not handle coincident points (and this data from the government comes pre-rounded to a tenth of a degree), d3.nest is used to collapse coincident points before constructing the Voronoi.

  
## index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>

body {
  width: 960px;
  margin: auto;
  position: relative;
}

svg {
  font: 11px "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

.axis--y path {
  display: none;
}

.cities {
  fill: none;
  stroke: #aaa;
  stroke-linejoin: round;
  stroke-linecap: round;
  stroke-width: 1.5px;
}

.city--hover {
  stroke: #000;
}

.focus text {
  text-anchor: middle;
  text-shadow: 0 1px 0 #fff, 1px 0 0 #fff, 0 -1px 0 #fff, -1px 0 0 #fff;
}

.voronoi path {
  fill: none;
  pointer-events: all;
}

.voronoi--show path {
  stroke: red;
  stroke-opacity: .2;
}

#form {
  position: absolute;
  top: 20px;
  right: 30px;
}

</style>
<label id="form" for="show-voronoi">
  Show Voronoi
  <input type="checkbox" id="show-voronoi" disabled>
</label>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>

var months,
    monthFormat = d3.time.format("%Y-%m");

var margin = {top: 20, right: 30, bottom: 30, left: 40},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

var x = d3.time.scale()
    .range([0, width]);

var y = d3.scale.linear()
    .range([height, 0]);

var color = d3.scale.category20();

var voronoi = d3.geom.voronoi()
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.value); })
    .clipExtent([[-margin.left, -margin.top], [width + margin.right, height + margin.bottom]]);

var line = d3.svg.line()
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.value); });

var svg = d3.select("body").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

d3.tsv("unemployment.tsv", type, function(error, cities) {
  x.domain(d3.extent(months));
  y.domain([d3.max(cities, function(c) { return d3.max(c.values, function(d) { return d.value; }); }), 0]).nice();

  svg.append("g")
      .attr("class", "axis axis--x")
      .attr("transform", "translate(0," + height + ")")
      .call(d3.svg.axis()
        .scale(x)
        .orient("bottom"));

  svg.append("g")
      .attr("class", "axis axis--y")
      .call(d3.svg.axis()
        .scale(y)
        .orient("left")
        .ticks(10, "%"))
    .append("text")
      .attr("x", 4)
      .attr("dy", ".32em")
      .style("font-weight", "bold")
      .text("Unemployment Rate");

  svg.append("g")
      .attr("class", "cities")
    .selectAll("path")
      .data(cities)
    .enter().append("path")
      .attr("d", function(d) { d.line = this; return line(d.values); });

  var focus = svg.append("g")
      .attr("transform", "translate(-100,-100)")
      .attr("class", "focus");

  focus.append("circle")
      .attr("r", 3.5);

  focus.append("text")
      .attr("y", -10);

  var voronoiGroup = svg.append("g")
      .attr("class", "voronoi");

  voronoiGroup.selectAll("path")
      .data(voronoi(d3.nest()
          .key(function(d) { return x(d.date) + "," + y(d.value); })
          .rollup(function(v) { return v[0]; })
          .entries(d3.merge(cities.map(function(d) { return d.values; })))
          .map(function(d) { return d.values; })))
    .enter().append("path")
      .attr("d", function(d) { return "M" + d.join("L") + "Z"; })
      .datum(function(d) { return d.point; })
      .on("mouseover", mouseover)
      .on("mouseout", mouseout);

  d3.select("#show-voronoi")
      .property("disabled", false)
      .on("change", function() { voronoiGroup.classed("voronoi--show", this.checked); });

  function mouseover(d) {
    d3.select(d.city.line).classed("city--hover", true);
    d.city.line.parentNode.appendChild(d.city.line);
    focus.attr("transform", "translate(" + x(d.date) + "," + y(d.value) + ")");
    focus.select("text").text(d.city.name);
  }

  function mouseout(d) {
    d3.select(d.city.line).classed("city--hover", false);
    focus.attr("transform", "translate(-100,-100)");
  }
});

function type(d, i) {
  if (!i) months = Object.keys(d).map(monthFormat.parse).filter(Number);
  var city = {
    name: d.name.replace(/ (msa|necta div|met necta|met div)$/i, ""),
    values: null
  };
  city.values = months.map(function(m) {
    return {
      city: city,
      date: m,
      value: d[monthFormat(m)] / 100
    };
  });
  return city;
}

</script>

## Makefile
GENERATED_FILES = \
	unemployment.tsv

.PHONY: all clean

all: $(GENERATED_FILES)

clean:
	rm -rf -- $(GENERATED_FILES)

# http://www.bls.gov/lau/metrossa.htm
build/ssamatab2.txt:
	mkdir -p build
	curl -o $@ 'http://www.bls.gov/lau/ssamatab2.txt'

unemployment.tsv: process-data build/ssamatab2.txt
	./process-data build/ssamatab2.txt > $@

## package.json
{
  "name": "anonymous",
  "version": "0.0.1",
  "private": true,
  "devDependencies": {
    "d3": "3"
  }
}

## process-data
#!/usr/bin/env node

var fs = require("fs"),
    d3 = require("d3");

// Parse lines.
var lines = fs.readFileSync(process.argv[2], "utf8").split(/[\r\n]+/);

// Parse fixed-width columns.
var data = lines.filter(function(d, i) {
  return i >= 3 && i <= lines.length - 4;
}).map(function(line) {
  var fields = line.split(/\s{2,}/), i = -1;
  return {
    "LAUS Code": fields[++i],
    "State FIPS Code": fields[++i],
    "Area FIPS Code": fields[++i],
    "Area": fields[++i],
    "Year": fields[++i],
    "Month": fields[++i],
    "Civilian Labor Force": +fields[++i].replace(/,/g, ""),
    "Employment": +fields[++i].replace(/,/g, ""),
    "Unemployment": +fields[++i].replace(/,/g, ""),
    "Unemployment Rate": +fields[++i]
  };
});

// Extract the available dates.
var dates = d3.set(data.map(function(d) { return d["Year"] + "-" + d["Month"]; })).values().sort();

// Nest unemployment rate by area and date.
var rateByNameAndDate = d3.nest()
    .key(function(d) { return d["Area"]; })
    .key(function(d) { return d["Year"] + "-" + d["Month"]; })
    .rollup(function(v) { return v[0]["Unemployment Rate"]; }) // leaf nest is unique
    .map(data, d3.map);

// Recast data into a wide table.
var rows = rateByNameAndDate.entries().sort(function(a, b) { return d3.ascending(a.key, b.key); }).map(function(area) {
  return [area.key].concat(dates.map(function(d) {
    return area.value.get(d);
  }));
});

process.stdout.write(d3.tsv.formatRows([["name"].concat(dates)].concat(rows)));

## thumbnail.png

      
    Raw
  

              thumbnail.png
            
          
## unemployment.tsv

          
            date
            charlotte-bobcats
            philadelphia-76ers
            miami-heat
            washington-wizards
            milwaukee-bucks
            new-york-knicks
            chicago-bulls
            detroit-pistons
            cleveland-cavaliers
            boston-celtics
            brooklyn-nets
            indiana-pacers
            orlando-magic
            toronto-raptors
            atlanta-hawks

            
              20131029
              3
              3
              1
              3
              3
              3
              14
              3
              3
              3
              3
              1
              14
              3
              3

            
              20131105
              4
              2
              3
              14
              11
              13
              11
              4
              4
              15
              4
              1
              4
              4
              4

            
              20131112
              7
              4
              2
              14
              8
              8
              4
              14
              8
              4
              8
              1
              8
              8
              3

            
              20131119
              5
              6
              2
              11
              15
              11
              3
              6
              9
              11
              11
              1
              6
              9
              4

            
              20131126
              4
              9
              2
              6
              15
              14
              4
              6
              12
              10
              12
              1
              10
              6
              3

            
              20131203
              7
              9
              2
              3
              15
              14
              5
              5
              12
              8
              13
              1
              11
              9
              4

            
              20131210
              4
              12
              2
              5
              15
              14
              7
              5
              9
              7
              11
              1
              13
              10
              3

            
              20131217
              6
              14
              2
              6
              15
              13
              9
              4
              10
              4
              10
              1
              12
              8
              3

            
              20131224
              4
              13
              2
              4
              15
              11
              9
              6
              10
              8
              11
              1
              13
              7
              3

            
              20131231
              6
              13
              2
              4
              15
              13
              9
              7
              10
              7
              10
              1
              10
              5
              3

            
              20140107
              7
              12
              2
              5
              15
              11
              6
              8
              12
              10
              9
              1
              14
              4
              3

            
              20140114
              8
              12
              2
              5
              15
              10
              5
              7
              11
              12
              8
              1
              14
              3
              3

            
              20140121
              8
              12
              2
              4
              15
              10
              4
              8
              10
              12
              7
              1
              14
              4
              3

            
              20140128
              8
              12
              2
              5
              15
              9
              5
              9
              11
              12
              7
              1
              14
              3
              3

            
              20140204
              8
              13
              2
              5
              15
              10
              6
              9
              11
              12
              7
              1
              14
              3
              4

            
              20140211
              8
              14
              2
              6
              15
              10
              4
              9
              11
              12
              7
              1
              13
              3
              5

            
              20140218
              8
              14
              2
              6
              15
              11
              4
              9
              10
              12
              6
              1
              13
              3
              5

            
              20140225
              7
              14
              2
              5
              15
              11
              4
              9
              10
              12
              6
              1
              13
              3
              8

            
              20140304
              7
              14
              2
              5
              15
              11
              4
              9
              10
              12
              6
              1
              13
              3
              7

            
              20140311
              7
              14
              2
              5
              15
              10
              4
              9
              11
              12
              6
              1
              13
              3
              8

            
              20140318
              7
              14
              2
              5
              15
              9
              4
              10
              10
              12
              5
              1
              13
              3
              8

            
              20140325
              7
              14
              2
              6
              15
              9
              4
              10
              10
              12
              5
              1
              13
              3
              8
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>

	body {
	width: 960px;
	margin: auto;
	position: relative;
	}

	svg {
	font: 11px "Helvetica Neue", Helvetica, Arial, sans-serif;
	}

	.axis path,
	.axis line {
	fill: none;
	stroke: #000;
	shape-rendering: crispEdges;
	}

	.axis--y path {
	display: none;
	}

	.cities {
	fill: none;
	stroke: #aaa;
	stroke-linejoin: round;
	stroke-linecap: round;
	stroke-width: 1.5px;
	}

	.city--hover {
	stroke: #000;
	}

	.focus text {
	text-anchor: middle;
	text-shadow: 0 1px 0 #fff, 1px 0 0 #fff, 0 -1px 0 #fff, -1px 0 0 #fff;
	}

	.voronoi path {
	fill: none;
	pointer-events: all;
	}

	.voronoi--show path {
	stroke: red;
	stroke-opacity: .2;
	}

	#form {
	position: absolute;
	top: 20px;
	right: 30px;
	}

	</style>
	<label id="form" for="show-voronoi">
	Show Voronoi
	<input type="checkbox" id="show-voronoi" disabled>
	</label>
	<script src="http://d3js.org/d3.v3.min.js"></script>
	<script>

	var months,
	monthFormat = d3.time.format("%Y-%m");

	var margin = {top: 20, right: 30, bottom: 30, left: 40},
	width = 960 - margin.left - margin.right,
	height = 500 - margin.top - margin.bottom;

	var x = d3.time.scale()
	.range([0, width]);

	var y = d3.scale.linear()
	.range([height, 0]);

	var color = d3.scale.category20();

	var voronoi = d3.geom.voronoi()
	.x(function(d) { return x(d.date); })
	.y(function(d) { return y(d.value); })
	.clipExtent([[-margin.left, -margin.top], [width + margin.right, height + margin.bottom]]);

	var line = d3.svg.line()
	.x(function(d) { return x(d.date); })
	.y(function(d) { return y(d.value); });

	var svg = d3.select("body").append("svg")
	.attr("width", width + margin.left + margin.right)
	.attr("height", height + margin.top + margin.bottom)
	.append("g")
	.attr("transform", "translate(" + margin.left + "," + margin.top + ")");

	d3.tsv("unemployment.tsv", type, function(error, cities) {
	x.domain(d3.extent(months));
	y.domain([d3.max(cities, function(c) { return d3.max(c.values, function(d) { return d.value; }); }), 0]).nice();

	svg.append("g")
	.attr("class", "axis axis--x")
	.attr("transform", "translate(0," + height + ")")
	.call(d3.svg.axis()
	.scale(x)
	.orient("bottom"));

	svg.append("g")
	.attr("class", "axis axis--y")
	.call(d3.svg.axis()
	.scale(y)
	.orient("left")
	.ticks(10, "%"))
	.append("text")
	.attr("x", 4)
	.attr("dy", ".32em")
	.style("font-weight", "bold")
	.text("Unemployment Rate");

	svg.append("g")
	.attr("class", "cities")
	.selectAll("path")
	.data(cities)
	.enter().append("path")
	.attr("d", function(d) { d.line = this; return line(d.values); });

	var focus = svg.append("g")
	.attr("transform", "translate(-100,-100)")
	.attr("class", "focus");

	focus.append("circle")
	.attr("r", 3.5);

	focus.append("text")
	.attr("y", -10);

	var voronoiGroup = svg.append("g")
	.attr("class", "voronoi");

	voronoiGroup.selectAll("path")
	.data(voronoi(d3.nest()
	.key(function(d) { return x(d.date) + "," + y(d.value); })
	.rollup(function(v) { return v[0]; })
	.entries(d3.merge(cities.map(function(d) { return d.values; })))
	.map(function(d) { return d.values; })))
	.enter().append("path")
	.attr("d", function(d) { return "M" + d.join("L") + "Z"; })
	.datum(function(d) { return d.point; })
	.on("mouseover", mouseover)
	.on("mouseout", mouseout);

	d3.select("#show-voronoi")
	.property("disabled", false)
	.on("change", function() { voronoiGroup.classed("voronoi--show", this.checked); });

	function mouseover(d) {
	d3.select(d.city.line).classed("city--hover", true);
	d.city.line.parentNode.appendChild(d.city.line);
	focus.attr("transform", "translate(" + x(d.date) + "," + y(d.value) + ")");
	focus.select("text").text(d.city.name);
	}

	function mouseout(d) {
	d3.select(d.city.line).classed("city--hover", false);
	focus.attr("transform", "translate(-100,-100)");
	}
	});

	function type(d, i) {
	if (!i) months = Object.keys(d).map(monthFormat.parse).filter(Number);
	var city = {
	name: d.name.replace(/ (msa\|necta div\|met necta\|met div)$/i, ""),
	values: null
	};
	city.values = months.map(function(m) {
	return {
	city: city,
	date: m,
	value: d[monthFormat(m)] / 100
	};
	});
	return city;
	}

	</script>
	GENERATED_FILES = \
	unemployment.tsv

	.PHONY: all clean

	all: $(GENERATED_FILES)

	clean:
	rm -rf -- $(GENERATED_FILES)

	# http://www.bls.gov/lau/metrossa.htm
	build/ssamatab2.txt:
	mkdir -p build
	curl -o $@ 'http://www.bls.gov/lau/ssamatab2.txt'

	unemployment.tsv: process-data build/ssamatab2.txt
	./process-data build/ssamatab2.txt > $@
	{
	"name": "anonymous",
	"version": "0.0.1",
	"private": true,
	"devDependencies": {
	"d3": "3"
	}
	}
	#!/usr/bin/env node

	var fs = require("fs"),
	d3 = require("d3");

	// Parse lines.
	var lines = fs.readFileSync(process.argv[2], "utf8").split(/[\r\n]+/);

	// Parse fixed-width columns.
	var data = lines.filter(function(d, i) {
	return i >= 3 && i <= lines.length - 4;
	}).map(function(line) {
	var fields = line.split(/\s{2,}/), i = -1;
	return {
	"LAUS Code": fields[++i],
	"State FIPS Code": fields[++i],
	"Area FIPS Code": fields[++i],
	"Area": fields[++i],
	"Year": fields[++i],
	"Month": fields[++i],
	"Civilian Labor Force": +fields[++i].replace(/,/g, ""),
	"Employment": +fields[++i].replace(/,/g, ""),
	"Unemployment": +fields[++i].replace(/,/g, ""),
	"Unemployment Rate": +fields[++i]
	};
	});

	// Extract the available dates.
	var dates = d3.set(data.map(function(d) { return d["Year"] + "-" + d["Month"]; })).values().sort();

	// Nest unemployment rate by area and date.
	var rateByNameAndDate = d3.nest()
	.key(function(d) { return d["Area"]; })
	.key(function(d) { return d["Year"] + "-" + d["Month"]; })
	.rollup(function(v) { return v[0]["Unemployment Rate"]; }) // leaf nest is unique
	.map(data, d3.map);

	// Recast data into a wide table.
	var rows = rateByNameAndDate.entries().sort(function(a, b) { return d3.ascending(a.key, b.key); }).map(function(area) {
	return [area.key].concat(dates.map(function(d) {
	return area.value.get(d);
	}));
	});

	process.stdout.write(d3.tsv.formatRows([["name"].concat(dates)].concat(rows)));
date	charlotte-bobcats	philadelphia-76ers	miami-heat	washington-wizards	milwaukee-bucks	new-york-knicks	chicago-bulls	detroit-pistons	cleveland-cavaliers	boston-celtics	brooklyn-nets	indiana-pacers	orlando-magic	toronto-raptors	atlanta-hawks
20131029	3	3	1	3	3	3	14	3	3	3	3	1	14	3	3
20131105	4	2	3	14	11	13	11	4	4	15	4	1	4	4	4
20131112	7	4	2	14	8	8	4	14	8	4	8	1	8	8	3
20131119	5	6	2	11	15	11	3	6	9	11	11	1	6	9	4
20131126	4	9	2	6	15	14	4	6	12	10	12	1	10	6	3
20131203	7	9	2	3	15	14	5	5	12	8	13	1	11	9	4
20131210	4	12	2	5	15	14	7	5	9	7	11	1	13	10	3
20131217	6	14	2	6	15	13	9	4	10	4	10	1	12	8	3
20131224	4	13	2	4	15	11	9	6	10	8	11	1	13	7	3
20131231	6	13	2	4	15	13	9	7	10	7	10	1	10	5	3
20140107	7	12	2	5	15	11	6	8	12	10	9	1	14	4	3
20140114	8	12	2	5	15	10	5	7	11	12	8	1	14	3	3
20140121	8	12	2	4	15	10	4	8	10	12	7	1	14	4	3
20140128	8	12	2	5	15	9	5	9	11	12	7	1	14	3	3
20140204	8	13	2	5	15	10	6	9	11	12	7	1	14	3	4
20140211	8	14	2	6	15	10	4	9	11	12	7	1	13	3	5
20140218	8	14	2	6	15	11	4	9	10	12	6	1	13	3	5
20140225	7	14	2	5	15	11	4	9	10	12	6	1	13	3	8
20140304	7	14	2	5	15	11	4	9	10	12	6	1	13	3	7
20140311	7	14	2	5	15	10	4	9	11	12	6	1	13	3	8
20140318	7	14	2	5	15	9	4	10	10	12	5	1	13	3	8
20140325	7	14	2	6	15	9	4	10	10	12	5	1	13	3	8