atmccann/data2.csv

## data2.csv

          
            State
             25 years old w/o subsidy
             25 years old w/ subsidy
            40 years old w/o subsidy
            40 years old w/ subsidy
            60 years old w/o subsidy
             60 years old w/ subsidy

            
              CT
              258.0
              193.0
              258.0
              193.0
              697.0
              193.0

            
              DC
              180.0
              180.0
              180.0
              180.0
              521.0
              193.0

            
              MD
              179.0
              179.0
              179.0
              179.0
              484.0
              193.0

            
              ME
              232.0
              193.0
              232.0
              193.0
              626.0
              193.0

            
              NY
              390.0
              193.0
              390.0
              193.0
              390.0
              193.0

            
              RI
              230.0
              193.0
              230.0
              193.0
              622.0
              193.0

            
              VA
              199.0
              193.0
              199.0
              193.0
              537.0
              193.0

            
              VT
              413.0
              193.0
              413.0
              193.0
              413.0
              193.0

            
              IN
              232.0
              193.0
              232.0
              193.0
              626.0
              193.0

            
              MT
              203.0
              193.0
              203.0
              193.0
              548.0
              193.0

            
              NE
              213.0
              193.0
              213.0
              193.0
              576.0
              193.0

            
              OH
              196.0
              193.0
              196.0
              193.0
              529.0
              193.0

            
              SD
              207.0
              193.0
              207.0
              193.0
              561.0
              193.0

            
              NM
              167.0
              167.0
              167.0
              167.0
              450.0
              193.0

            
              CA
              200.0
              193.0
              200.0
              193.0
              541.0
              193.0

            
              CO
              196.0
              193.0
              196.0
              193.0
              531.0
              193.0

            
              OR
              158.0
              158.0
              158.0
              158.0
              427.0
              193.0

            
              WA
              222.0
              193.0
              222.0
              193.0
              601.0
              193.0

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

body {
  font: 10px sans-serif;
}

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

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

.x.axis line {
display:none;
}


.x.axis text {
  font-weight:bold;
}

</style>
<body>

<p id="chart">

<p id="menu"><b>Filter States by Age Group</b><br>Age: <select></select>


<script src="http://d3js.org/d3.v3.min.js"></script>
<script>

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

var x0 = d3.scale.ordinal()
    .rangeRoundBands([0, width], .1);

var x1 = d3.scale.ordinal();

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

var color = d3.scale.ordinal()
    .range([ "rgb(223, 194, 125)", "rgb(191, 129, 45)","rgb(1, 102, 94)", "rgb(53, 151, 143)", "rgb(140, 81, 10)", "rgb(84, 48, 5)"]);

var xAxis = d3.svg.axis()
    .scale(x0)
    .orient("bottom");

var yAxis = d3.svg.axis()
    .scale(y)
    .orient("left")
    .tickFormat(d3.format("$"));

var svg = d3.select("#chart").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.csv("data2.csv", function(error, data) {
  var ageNames = d3.keys(data[0]).filter(function(key) { return key !== "State"; });

  data.forEach(function(d) {
    d.ages = ageNames.map(function(name) { return {name: name, value: +d[name]}; });
  });

  x0.domain(data.map(function(d) { return d.State; }));
  x1.domain(ageNames).rangeRoundBands([0, x0.rangeBand()]);
  y.domain([0, d3.max(data, function(d) { return d3.max(d.ages, function(d) { return d.value; }); })]);

  svg.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + height + ")")
      .call(xAxis);

  svg.append("g")
      .attr("class", "y axis")
      .call(yAxis)
    .append("text")
      .attr("transform", "rotate(-90)")
      .attr("y", 6)
      .attr("dy", ".71em")
      .style("text-anchor", "end")
      .text("Cost of premium");


var menu = d3.select("#menu select")
    .on("change", change);

    menu.selectAll("option")
      .data(data)
      .enter().append("option")
      .text(function(d) { return d; });

  menu.property("value", "18 to 24 Years");

  redraw();
});


var altKey;

d3.select(window)
    .on("keydown", function() { altKey = d3.event.altKey; })
    .on("keyup", function() { altKey = false; });

function change() {
  clearTimeout(timeout);

  d3.transition()
      .duration(altKey ? 7500 : 750)
      .each(redraw);
}

function redraw() {
  var age1 = menu.property("value"),
      top = states.sort(function(a, b) { return b[age1] - a[age1]; }); //this is where i'm getting confused -- how can i redraw without using this "top" variable?

 y.domain(top.map(function(d) { return d.State; }));


  var state = svg.selectAll(".state")
      .data(top, function(d) { return d.State; });

  var stateEnter = state.enter().insert("g", ".axis")
      .attr("class", "state")
      .attr("transform", function(d) { return "translate(" + x0(d.State) + ",0)"; });

    stateEnter.append("rect")
      .attr("width", x1.rangeBand())
      .attr("x", function(d) { return x1(d.name); })
      .attr("y", function(d) { return y(d.value); })
      .attr("height", function(d) { return height - y(d.value); })
      .style("fill", function(d) { return color(d.name); });


  x.domain([0, top[0][age = age1]]);

  var stateUpdate = d3.transition(state)
      .attr("transform", function(d) { return "translate(" + (d.x0 = x(d.State)) + ",0)"; })
      .style("fill-opacity", 1);

      stateUpdate.select("rect")
        .attr("height", function(d) { return height - y(d.value); });

      stateUpdate.select("value")
        .attr("y", function(d) { return height - y(d.value) - 3; });


    var stateExit = d3.transition(state.exit())
        .attr("transform", function(d) { return "translate(" + (d.x0 + width) + ",0)"; })
        .style("fill-opacity", 0)
        .remove();

      stateExit.select("rect")
        .attr("height", function(d) { return height - y(d.value); });

      stateExit.select("value")
        .attr("y", function(d) { return height - y(d.value) - 3; });


      d3.transition(svg).select(".yAxis.axis")
      .call(yAxis);
    }

  var timeout = setTimeout(function() {
  menu.property("value", "60 years old w/ subsidy").node().focus();
  change();
  }, 5000);

</script>
State	25 years old w/o subsidy	25 years old w/ subsidy	40 years old w/o subsidy	40 years old w/ subsidy	60 years old w/o subsidy	60 years old w/ subsidy
CT	258.0	193.0	258.0	193.0	697.0	193.0
DC	180.0	180.0	180.0	180.0	521.0	193.0
MD	179.0	179.0	179.0	179.0	484.0	193.0
ME	232.0	193.0	232.0	193.0	626.0	193.0
NY	390.0	193.0	390.0	193.0	390.0	193.0
RI	230.0	193.0	230.0	193.0	622.0	193.0
VA	199.0	193.0	199.0	193.0	537.0	193.0
VT	413.0	193.0	413.0	193.0	413.0	193.0
IN	232.0	193.0	232.0	193.0	626.0	193.0
MT	203.0	193.0	203.0	193.0	548.0	193.0
NE	213.0	193.0	213.0	193.0	576.0	193.0
OH	196.0	193.0	196.0	193.0	529.0	193.0
SD	207.0	193.0	207.0	193.0	561.0	193.0
NM	167.0	167.0	167.0	167.0	450.0	193.0
CA	200.0	193.0	200.0	193.0	541.0	193.0
CO	196.0	193.0	196.0	193.0	531.0	193.0
OR	158.0	158.0	158.0	158.0	427.0	193.0
WA	222.0	193.0	222.0	193.0	601.0	193.0
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>

	body {
	font: 10px sans-serif;
	}

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

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

	.x.axis line {
	display:none;
	}


	.x.axis text {
	font-weight:bold;
	}

	</style>
	<body>

	<p id="chart">

	<p id="menu"><b>Filter States by Age Group</b><br>Age: <select></select>


	<script src="http://d3js.org/d3.v3.min.js"></script>
	<script>

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

	var x0 = d3.scale.ordinal()
	.rangeRoundBands([0, width], .1);

	var x1 = d3.scale.ordinal();

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

	var color = d3.scale.ordinal()
	.range([ "rgb(223, 194, 125)", "rgb(191, 129, 45)","rgb(1, 102, 94)", "rgb(53, 151, 143)", "rgb(140, 81, 10)", "rgb(84, 48, 5)"]);

	var xAxis = d3.svg.axis()
	.scale(x0)
	.orient("bottom");

	var yAxis = d3.svg.axis()
	.scale(y)
	.orient("left")
	.tickFormat(d3.format("$"));

	var svg = d3.select("#chart").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.csv("data2.csv", function(error, data) {
	var ageNames = d3.keys(data[0]).filter(function(key) { return key !== "State"; });

	data.forEach(function(d) {
	d.ages = ageNames.map(function(name) { return {name: name, value: +d[name]}; });
	});

	x0.domain(data.map(function(d) { return d.State; }));
	x1.domain(ageNames).rangeRoundBands([0, x0.rangeBand()]);
	y.domain([0, d3.max(data, function(d) { return d3.max(d.ages, function(d) { return d.value; }); })]);

	svg.append("g")
	.attr("class", "x axis")
	.attr("transform", "translate(0," + height + ")")
	.call(xAxis);

	svg.append("g")
	.attr("class", "y axis")
	.call(yAxis)
	.append("text")
	.attr("transform", "rotate(-90)")
	.attr("y", 6)
	.attr("dy", ".71em")
	.style("text-anchor", "end")
	.text("Cost of premium");


	var menu = d3.select("#menu select")
	.on("change", change);

	menu.selectAll("option")
	.data(data)
	.enter().append("option")
	.text(function(d) { return d; });

	menu.property("value", "18 to 24 Years");

	redraw();
	});


	var altKey;

	d3.select(window)
	.on("keydown", function() { altKey = d3.event.altKey; })
	.on("keyup", function() { altKey = false; });

	function change() {
	clearTimeout(timeout);

	d3.transition()
	.duration(altKey ? 7500 : 750)
	.each(redraw);
	}

	function redraw() {
	var age1 = menu.property("value"),
	top = states.sort(function(a, b) { return b[age1] - a[age1]; }); //this is where i'm getting confused -- how can i redraw without using this "top" variable?

	y.domain(top.map(function(d) { return d.State; }));


	var state = svg.selectAll(".state")
	.data(top, function(d) { return d.State; });

	var stateEnter = state.enter().insert("g", ".axis")
	.attr("class", "state")
	.attr("transform", function(d) { return "translate(" + x0(d.State) + ",0)"; });

	stateEnter.append("rect")
	.attr("width", x1.rangeBand())
	.attr("x", function(d) { return x1(d.name); })
	.attr("y", function(d) { return y(d.value); })
	.attr("height", function(d) { return height - y(d.value); })
	.style("fill", function(d) { return color(d.name); });


	x.domain([0, top[0][age = age1]]);

	var stateUpdate = d3.transition(state)
	.attr("transform", function(d) { return "translate(" + (d.x0 = x(d.State)) + ",0)"; })
	.style("fill-opacity", 1);

	stateUpdate.select("rect")
	.attr("height", function(d) { return height - y(d.value); });

	stateUpdate.select("value")
	.attr("y", function(d) { return height - y(d.value) - 3; });


	var stateExit = d3.transition(state.exit())
	.attr("transform", function(d) { return "translate(" + (d.x0 + width) + ",0)"; })
	.style("fill-opacity", 0)
	.remove();

	stateExit.select("rect")
	.attr("height", function(d) { return height - y(d.value); });

	stateExit.select("value")
	.attr("y", function(d) { return height - y(d.value) - 3; });


	d3.transition(svg).select(".yAxis.axis")
	.call(yAxis);
	}

	var timeout = setTimeout(function() {
	menu.property("value", "60 years old w/ subsidy").node().focus();
	change();
	}, 5000);

	</script>