quinnhj/README.md

## README.md

      
    Raw
  

              README.md
            
          
    This is an example of integrating two visualizations using interactions on one of them. Based on mbostock's scatterplot and histogram demos, plus lgersman's selection window code: http://bl.ocks.org/lgersman/5311083. Forgive the horrid code -- I might clean this up later.
forked from mbostock's block: Scatterplot

  
## data.tsv

          
            sepalLength
            sepalWidth
            petalLength
            petalWidth
            species

            
              5.1
              3.5
              1.4
              0.2
              setosa

            
              4.9
              3.0
              1.4
              0.2
              setosa

            
              4.7
              3.2
              1.3
              0.2
              setosa

            
              4.6
              3.1
              1.5
              0.2
              setosa

            
              5.0
              3.6
              1.4
              0.2
              setosa

            
              5.4
              3.9
              1.7
              0.4
              setosa

            
              4.6
              3.4
              1.4
              0.3
              setosa

            
              5.0
              3.4
              1.5
              0.2
              setosa

            
              4.4
              2.9
              1.4
              0.2
              setosa

            
              4.9
              3.1
              1.5
              0.1
              setosa

            
              5.4
              3.7
              1.5
              0.2
              setosa

            
              4.8
              3.4
              1.6
              0.2
              setosa

            
              4.8
              3.0
              1.4
              0.1
              setosa

            
              4.3
              3.0
              1.1
              0.1
              setosa

            
              5.8
              4.0
              1.2
              0.2
              setosa

            
              5.7
              4.4
              1.5
              0.4
              setosa

            
              5.4
              3.9
              1.3
              0.4
              setosa

            
              5.1
              3.5
              1.4
              0.3
              setosa

            
              5.7
              3.8
              1.7
              0.3
              setosa

            
              5.1
              3.8
              1.5
              0.3
              setosa

            
              5.4
              3.4
              1.7
              0.2
              setosa

            
              5.1
              3.7
              1.5
              0.4
              setosa

            
              4.6
              3.6
              1.0
              0.2
              setosa

            
              5.1
              3.3
              1.7
              0.5
              setosa

            
              4.8
              3.4
              1.9
              0.2
              setosa

            
              5.0
              3.0
              1.6
              0.2
              setosa

            
              5.0
              3.4
              1.6
              0.4
              setosa

            
              5.2
              3.5
              1.5
              0.2
              setosa

            
              5.2
              3.4
              1.4
              0.2
              setosa

            
              4.7
              3.2
              1.6
              0.2
              setosa

            
              4.8
              3.1
              1.6
              0.2
              setosa

            
              5.4
              3.4
              1.5
              0.4
              setosa

            
              5.2
              4.1
              1.5
              0.1
              setosa

            
              5.5
              4.2
              1.4
              0.2
              setosa

            
              4.9
              3.1
              1.5
              0.2
              setosa

            
              5.0
              3.2
              1.2
              0.2
              setosa

            
              5.5
              3.5
              1.3
              0.2
              setosa

            
              4.9
              3.6
              1.4
              0.1
              setosa

            
              4.4
              3.0
              1.3
              0.2
              setosa

            
              5.1
              3.4
              1.5
              0.2
              setosa

            
              5.0
              3.5
              1.3
              0.3
              setosa

            
              4.5
              2.3
              1.3
              0.3
              setosa

            
              4.4
              3.2
              1.3
              0.2
              setosa

            
              5.0
              3.5
              1.6
              0.6
              setosa

            
              5.1
              3.8
              1.9
              0.4
              setosa

            
              4.8
              3.0
              1.4
              0.3
              setosa

            
              5.1
              3.8
              1.6
              0.2
              setosa

            
              4.6
              3.2
              1.4
              0.2
              setosa

            
              5.3
              3.7
              1.5
              0.2
              setosa

            
              5.0
              3.3
              1.4
              0.2
              setosa

            
              7.0
              3.2
              4.7
              1.4
              versicolor

            
              6.4
              3.2
              4.5
              1.5
              versicolor

            
              6.9
              3.1
              4.9
              1.5
              versicolor

            
              5.5
              2.3
              4.0
              1.3
              versicolor

            
              6.5
              2.8
              4.6
              1.5
              versicolor

            
              5.7
              2.8
              4.5
              1.3
              versicolor

            
              6.3
              3.3
              4.7
              1.6
              versicolor

            
              4.9
              2.4
              3.3
              1.0
              versicolor

            
              6.6
              2.9
              4.6
              1.3
              versicolor

            
              5.2
              2.7
              3.9
              1.4
              versicolor

            
              5.0
              2.0
              3.5
              1.0
              versicolor

            
              5.9
              3.0
              4.2
              1.5
              versicolor

            
              6.0
              2.2
              4.0
              1.0
              versicolor

            
              6.1
              2.9
              4.7
              1.4
              versicolor

            
              5.6
              2.9
              3.6
              1.3
              versicolor

            
              6.7
              3.1
              4.4
              1.4
              versicolor

            
              5.6
              3.0
              4.5
              1.5
              versicolor

            
              5.8
              2.7
              4.1
              1.0
              versicolor

            
              6.2
              2.2
              4.5
              1.5
              versicolor

            
              5.6
              2.5
              3.9
              1.1
              versicolor

            
              5.9
              3.2
              4.8
              1.8
              versicolor

            
              6.1
              2.8
              4.0
              1.3
              versicolor

            
              6.3
              2.5
              4.9
              1.5
              versicolor

            
              6.1
              2.8
              4.7
              1.2
              versicolor

            
              6.4
              2.9
              4.3
              1.3
              versicolor

            
              6.6
              3.0
              4.4
              1.4
              versicolor

            
              6.8
              2.8
              4.8
              1.4
              versicolor

            
              6.7
              3.0
              5.0
              1.7
              versicolor

            
              6.0
              2.9
              4.5
              1.5
              versicolor

            
              5.7
              2.6
              3.5
              1.0
              versicolor

            
              5.5
              2.4
              3.8
              1.1
              versicolor

            
              5.5
              2.4
              3.7
              1.0
              versicolor

            
              5.8
              2.7
              3.9
              1.2
              versicolor

            
              6.0
              2.7
              5.1
              1.6
              versicolor

            
              5.4
              3.0
              4.5
              1.5
              versicolor

            
              6.0
              3.4
              4.5
              1.6
              versicolor

            
              6.7
              3.1
              4.7
              1.5
              versicolor

            
              6.3
              2.3
              4.4
              1.3
              versicolor

            
              5.6
              3.0
              4.1
              1.3
              versicolor

            
              5.5
              2.5
              4.0
              1.3
              versicolor

            
              5.5
              2.6
              4.4
              1.2
              versicolor

            
              6.1
              3.0
              4.6
              1.4
              versicolor

            
              5.8
              2.6
              4.0
              1.2
              versicolor

            
              5.0
              2.3
              3.3
              1.0
              versicolor

            
              5.6
              2.7
              4.2
              1.3
              versicolor

            
              5.7
              3.0
              4.2
              1.2
              versicolor

            
              5.7
              2.9
              4.2
              1.3
              versicolor

            
              6.2
              2.9
              4.3
              1.3
              versicolor

            
              5.1
              2.5
              3.0
              1.1
              versicolor

            
              5.7
              2.8
              4.1
              1.3
              versicolor

            
              6.3
              3.3
              6.0
              2.5
              virginica

            
              5.8
              2.7
              5.1
              1.9
              virginica

            
              7.1
              3.0
              5.9
              2.1
              virginica

            
              6.3
              2.9
              5.6
              1.8
              virginica

            
              6.5
              3.0
              5.8
              2.2
              virginica

            
              7.6
              3.0
              6.6
              2.1
              virginica

            
              4.9
              2.5
              4.5
              1.7
              virginica

            
              7.3
              2.9
              6.3
              1.8
              virginica

            
              6.7
              2.5
              5.8
              1.8
              virginica

            
              7.2
              3.6
              6.1
              2.5
              virginica

            
              6.5
              3.2
              5.1
              2.0
              virginica

            
              6.4
              2.7
              5.3
              1.9
              virginica

            
              6.8
              3.0
              5.5
              2.1
              virginica

            
              5.7
              2.5
              5.0
              2.0
              virginica

            
              5.8
              2.8
              5.1
              2.4
              virginica

            
              6.4
              3.2
              5.3
              2.3
              virginica

            
              6.5
              3.0
              5.5
              1.8
              virginica

            
              7.7
              3.8
              6.7
              2.2
              virginica

            
              7.7
              2.6
              6.9
              2.3
              virginica

            
              6.0
              2.2
              5.0
              1.5
              virginica

            
              6.9
              3.2
              5.7
              2.3
              virginica

            
              5.6
              2.8
              4.9
              2.0
              virginica

            
              7.7
              2.8
              6.7
              2.0
              virginica

            
              6.3
              2.7
              4.9
              1.8
              virginica

            
              6.7
              3.3
              5.7
              2.1
              virginica

            
              7.2
              3.2
              6.0
              1.8
              virginica

            
              6.2
              2.8
              4.8
              1.8
              virginica

            
              6.1
              3.0
              4.9
              1.8
              virginica

            
              6.4
              2.8
              5.6
              2.1
              virginica

            
              7.2
              3.0
              5.8
              1.6
              virginica

            
              7.4
              2.8
              6.1
              1.9
              virginica

            
              7.9
              3.8
              6.4
              2.0
              virginica

            
              6.4
              2.8
              5.6
              2.2
              virginica

            
              6.3
              2.8
              5.1
              1.5
              virginica

            
              6.1
              2.6
              5.6
              1.4
              virginica

            
              7.7
              3.0
              6.1
              2.3
              virginica

            
              6.3
              3.4
              5.6
              2.4
              virginica

            
              6.4
              3.1
              5.5
              1.8
              virginica

            
              6.0
              3.0
              4.8
              1.8
              virginica

            
              6.9
              3.1
              5.4
              2.1
              virginica

            
              6.7
              3.1
              5.6
              2.4
              virginica

            
              6.9
              3.1
              5.1
              2.3
              virginica

            
              5.8
              2.7
              5.1
              1.9
              virginica

            
              6.8
              3.2
              5.9
              2.3
              virginica

            
              6.7
              3.3
              5.7
              2.5
              virginica

            
              6.7
              3.0
              5.2
              2.3
              virginica

            
              6.3
              2.5
              5.0
              1.9
              virginica

            
              6.5
              3.0
              5.2
              2.0
              virginica

            
              6.2
              3.4
              5.4
              2.3
              virginica

            
              5.9
              3.0
              5.1
              1.8
              virginica

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

body {
  font: 10px sans-serif;
}

.bar rect {
  fill: steelblue;
  shape-rendering: crispEdges;
}

.bar text {
  fill: #fff;
}

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

.dot {
  stroke: #000;
}

.inspectorlabel {
	font-size: 14px;
}

rect.selectionWindow {

  stroke: darkblue;
  stroke-opacity: 0.8;
  stroke-dasharray: 8px;
  fill: transparent;

}

svg {
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}


</style>
<body>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
<script>

var attrToHistogram = 'petalLength';
var inspectorHeightWithMargin = 150;
var margin = {top: 20, right: 20, bottom: 30, left: 40},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom - inspectorHeightWithMargin;

var inspectorHeight = inspectorHeightWithMargin - margin.top - margin.bottom;

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

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

var color = d3.scale.category10();

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

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

var rawsvg = d3.select("body").append("svg");

var selectedDots = [];

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

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

var normalizeP = function (p) {
	p[0] = p[0] - margin.left;
  p[1] = p[1] - margin.top;
  return p;
}

var setupDraggableWindow = function (data) {

 	rawsvg.on("mousedown", function () {

    console.log('mousedown');
    var p = d3.mouse(this);
    p = normalizeP(p);
    svg.append("rect")
    	.attr({
      	rx: 6,
      	ry: 6,
        class: "selectionWindow",
      	x: p[0],
      	y: p[1],
      	width: 0,
      	height: 0
    	});
  }).on("mousemove", function () {
		var s = svg.select("rect.selectionWindow");

    if (!s.empty()) {
    	var p = d3.mouse(this);
      p = normalizeP(p);
      var d = {
        x: parseInt(s.attr("x"), 10),
        y: parseInt(s.attr("y"), 10),
        width: parseInt(s.attr("width"), 10),
        height: parseInt(s.attr("height"), 10)
      };
      var move = {
       	x: p[0] - d.x,
        y: p[1] - d.y
      };

      if( move.x < 1 || (move.x*2<d.width)) {
        d.x = p[0];
        d.width -= move.x;
      } else {
        d.width = move.x;
      }

      if( move.y < 1 || (move.y*2<d.height)) {
        d.y = p[1];
        d.height -= move.y;
      } else {
        d.height = move.y;
      }

      s.attr(d);

      var newSelectedDots = [];
      // Add remove selected items from some global.
      d3.selectAll('circle.dot').each( function (da, i) {
				var dataX = x(da.sepalWidth);
        var dataY = y(da.sepalLength);

				if (dataX >= d.x && dataX <= d.x + d.width && dataY >= d.y && dataY <= d.y + d.height) {

          newSelectedDots.push(da);
        }

      });
      renderInspectorHistogram(newSelectedDots);

    }

  }).on('mouseup', function () {
		svg.selectAll( "rect.selectionWindow").remove();
    renderInspectorHistogram([]);
  });

};


var setupScatterPlot = function (data) {

  x.domain(d3.extent(data, function(d) { return d.sepalWidth; })).nice();
  y.domain(d3.extent(data, function(d) { return d.sepalLength; })).nice();

  svg.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + height + ")")
      .call(xAxis)
    .append("text")
      .attr("class", "label")
      .attr("x", width)
      .attr("y", -6)
      .style("text-anchor", "end")
      .text("Sepal Width (cm)");

  svg.append("g")
      .attr("class", "y axis")
      .call(yAxis)
    .append("text")
      .attr("class", "label")
      .attr("transform", "rotate(-90)")
      .attr("y", 6)
      .attr("dy", ".71em")
      .style("text-anchor", "end")
      .text("Sepal Length (cm)")

  svg.selectAll(".dot")
      .data(data)
    .enter().append("circle")
      .attr("class", "dot")
      .attr("r", 3.5)
      .attr("cx", function(d) { return x(d.sepalWidth); })
      .attr("cy", function(d) { return y(d.sepalLength); })
      .style("fill", function(d) { return color(d.species); });

  var legend = svg.selectAll(".legend")
      .data(color.domain())
    .enter().append("g")
      .attr("class", "legend")
      .attr("transform", function(d, i) { return "translate(0," + i * 20 + ")"; });

  legend.append("rect")
      .attr("x", width - 18)
      .attr("width", 18)
      .attr("height", 18)
      .style("fill", color);

  legend.append("text")
      .attr("x", width - 24)
      .attr("y", 9)
      .attr("dy", ".35em")
      .style("text-anchor", "end")
      .text(function(d) { return d; });
}

function renderInspectorHistogram (inputData) {

  var text = inputData ? attrToHistogram + ':' : 'Click and drag to select a region.';
  if (inputData && inputData.length === 1) {
   	text = 'layout.histogram() seems to be broken with 1 element :(';
  }
  console.log('text: ', text);
  inspectorSvg.selectAll(".inspectorlabel").remove();
  inspectorSvg.append("text")
      .attr("class", "inspectorlabel")
      .attr("x", 10)
      .attr("y", -10)
      .text(text);

  if (!inputData || inputData.length < 2) {
   	return;
  }

  var subsetData = inputData;
  var values = subsetData.map(function (data) { return +data[attrToHistogram]; });

  inspectorSvg.selectAll(".bar").remove();
  inspectorSvg.selectAll(".axis").remove();

  var formatCount = d3.format(",.0f");
  var extent = d3.extent(values);

  var xForHistogram = d3.scale.linear()
  		.domain(extent)
  		.range([0, width]);

  var xForBarWidth = d3.scale.linear()
  		.domain([0, extent[1] - extent[0]])
      .range([0, width]);

  var x = d3.scale.linear()
      .domain([0, 1])
      .range([0, width]);

  // Generate a histogram using twenty uniformly-spaced bins.
  var data = d3.layout.histogram()
      .bins(xForHistogram.ticks(20))
      (values);


  var y = d3.scale.linear()
      .domain([0, d3.max(data, function(d) { return d.y; })])
      .range([inspectorHeight, 0]);

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

  var bar = inspectorSvg.selectAll(".bar")
      .data(data)
    .enter().append("g")
      .attr("class", "bar")
      .attr("transform", function(d) { return "translate(" + xForHistogram(d.x) + "," + y(d.y) + ")"; });

  bar.append("rect")
      .attr("x", 1)
      .attr("width", xForBarWidth(data[0].dx) - 1)
      .attr("height", function(d) { return inspectorHeight - y(d.y); });

  bar.append("text")
      .attr("dy", ".75em")
      .attr("y", 6)
      .attr("x", xForBarWidth(data[0].dx) / 2)
      .attr("text-anchor", "middle")
      .text(function(d) { return formatCount(d.y); });

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

}


d3.tsv("data.tsv", function(error, data) {
  if (error) throw error;

  data.forEach(function(d) {
    d.sepalLength = +d.sepalLength;
    d.sepalWidth = +d.sepalWidth;
  });

  setupScatterPlot(data);
  setupDraggableWindow(data);
  renderInspectorHistogram();

});

</script>
sepalLength	sepalWidth	petalLength	petalWidth	species
5.1	3.5	1.4	0.2	setosa
4.9	3.0	1.4	0.2	setosa
4.7	3.2	1.3	0.2	setosa
4.6	3.1	1.5	0.2	setosa
5.0	3.6	1.4	0.2	setosa
5.4	3.9	1.7	0.4	setosa
4.6	3.4	1.4	0.3	setosa
5.0	3.4	1.5	0.2	setosa
4.4	2.9	1.4	0.2	setosa
4.9	3.1	1.5	0.1	setosa
5.4	3.7	1.5	0.2	setosa
4.8	3.4	1.6	0.2	setosa
4.8	3.0	1.4	0.1	setosa
4.3	3.0	1.1	0.1	setosa
5.8	4.0	1.2	0.2	setosa
5.7	4.4	1.5	0.4	setosa
5.4	3.9	1.3	0.4	setosa
5.1	3.5	1.4	0.3	setosa
5.7	3.8	1.7	0.3	setosa
5.1	3.8	1.5	0.3	setosa
5.4	3.4	1.7	0.2	setosa
5.1	3.7	1.5	0.4	setosa
4.6	3.6	1.0	0.2	setosa
5.1	3.3	1.7	0.5	setosa
4.8	3.4	1.9	0.2	setosa
5.0	3.0	1.6	0.2	setosa
5.0	3.4	1.6	0.4	setosa
5.2	3.5	1.5	0.2	setosa
5.2	3.4	1.4	0.2	setosa
4.7	3.2	1.6	0.2	setosa
4.8	3.1	1.6	0.2	setosa
5.4	3.4	1.5	0.4	setosa
5.2	4.1	1.5	0.1	setosa
5.5	4.2	1.4	0.2	setosa
4.9	3.1	1.5	0.2	setosa
5.0	3.2	1.2	0.2	setosa
5.5	3.5	1.3	0.2	setosa
4.9	3.6	1.4	0.1	setosa
4.4	3.0	1.3	0.2	setosa
5.1	3.4	1.5	0.2	setosa
5.0	3.5	1.3	0.3	setosa
4.5	2.3	1.3	0.3	setosa
4.4	3.2	1.3	0.2	setosa
5.0	3.5	1.6	0.6	setosa
5.1	3.8	1.9	0.4	setosa
4.8	3.0	1.4	0.3	setosa
5.1	3.8	1.6	0.2	setosa
4.6	3.2	1.4	0.2	setosa
5.3	3.7	1.5	0.2	setosa
5.0	3.3	1.4	0.2	setosa
7.0	3.2	4.7	1.4	versicolor
6.4	3.2	4.5	1.5	versicolor
6.9	3.1	4.9	1.5	versicolor
5.5	2.3	4.0	1.3	versicolor
6.5	2.8	4.6	1.5	versicolor
5.7	2.8	4.5	1.3	versicolor
6.3	3.3	4.7	1.6	versicolor
4.9	2.4	3.3	1.0	versicolor
6.6	2.9	4.6	1.3	versicolor
5.2	2.7	3.9	1.4	versicolor
5.0	2.0	3.5	1.0	versicolor
5.9	3.0	4.2	1.5	versicolor
6.0	2.2	4.0	1.0	versicolor
6.1	2.9	4.7	1.4	versicolor
5.6	2.9	3.6	1.3	versicolor
6.7	3.1	4.4	1.4	versicolor
5.6	3.0	4.5	1.5	versicolor
5.8	2.7	4.1	1.0	versicolor
6.2	2.2	4.5	1.5	versicolor
5.6	2.5	3.9	1.1	versicolor
5.9	3.2	4.8	1.8	versicolor
6.1	2.8	4.0	1.3	versicolor
6.3	2.5	4.9	1.5	versicolor
6.1	2.8	4.7	1.2	versicolor
6.4	2.9	4.3	1.3	versicolor
6.6	3.0	4.4	1.4	versicolor
6.8	2.8	4.8	1.4	versicolor
6.7	3.0	5.0	1.7	versicolor
6.0	2.9	4.5	1.5	versicolor
5.7	2.6	3.5	1.0	versicolor
5.5	2.4	3.8	1.1	versicolor
5.5	2.4	3.7	1.0	versicolor
5.8	2.7	3.9	1.2	versicolor
6.0	2.7	5.1	1.6	versicolor
5.4	3.0	4.5	1.5	versicolor
6.0	3.4	4.5	1.6	versicolor
6.7	3.1	4.7	1.5	versicolor
6.3	2.3	4.4	1.3	versicolor
5.6	3.0	4.1	1.3	versicolor
5.5	2.5	4.0	1.3	versicolor
5.5	2.6	4.4	1.2	versicolor
6.1	3.0	4.6	1.4	versicolor
5.8	2.6	4.0	1.2	versicolor
5.0	2.3	3.3	1.0	versicolor
5.6	2.7	4.2	1.3	versicolor
5.7	3.0	4.2	1.2	versicolor
5.7	2.9	4.2	1.3	versicolor
6.2	2.9	4.3	1.3	versicolor
5.1	2.5	3.0	1.1	versicolor
5.7	2.8	4.1	1.3	versicolor
6.3	3.3	6.0	2.5	virginica
5.8	2.7	5.1	1.9	virginica
7.1	3.0	5.9	2.1	virginica
6.3	2.9	5.6	1.8	virginica
6.5	3.0	5.8	2.2	virginica
7.6	3.0	6.6	2.1	virginica
4.9	2.5	4.5	1.7	virginica
7.3	2.9	6.3	1.8	virginica
6.7	2.5	5.8	1.8	virginica
7.2	3.6	6.1	2.5	virginica
6.5	3.2	5.1	2.0	virginica
6.4	2.7	5.3	1.9	virginica
6.8	3.0	5.5	2.1	virginica
5.7	2.5	5.0	2.0	virginica
5.8	2.8	5.1	2.4	virginica
6.4	3.2	5.3	2.3	virginica
6.5	3.0	5.5	1.8	virginica
7.7	3.8	6.7	2.2	virginica
7.7	2.6	6.9	2.3	virginica
6.0	2.2	5.0	1.5	virginica
6.9	3.2	5.7	2.3	virginica
5.6	2.8	4.9	2.0	virginica
7.7	2.8	6.7	2.0	virginica
6.3	2.7	4.9	1.8	virginica
6.7	3.3	5.7	2.1	virginica
7.2	3.2	6.0	1.8	virginica
6.2	2.8	4.8	1.8	virginica
6.1	3.0	4.9	1.8	virginica
6.4	2.8	5.6	2.1	virginica
7.2	3.0	5.8	1.6	virginica
7.4	2.8	6.1	1.9	virginica
7.9	3.8	6.4	2.0	virginica
6.4	2.8	5.6	2.2	virginica
6.3	2.8	5.1	1.5	virginica
6.1	2.6	5.6	1.4	virginica
7.7	3.0	6.1	2.3	virginica
6.3	3.4	5.6	2.4	virginica
6.4	3.1	5.5	1.8	virginica
6.0	3.0	4.8	1.8	virginica
6.9	3.1	5.4	2.1	virginica
6.7	3.1	5.6	2.4	virginica
6.9	3.1	5.1	2.3	virginica
5.8	2.7	5.1	1.9	virginica
6.8	3.2	5.9	2.3	virginica
6.7	3.3	5.7	2.5	virginica
6.7	3.0	5.2	2.3	virginica
6.3	2.5	5.0	1.9	virginica
6.5	3.0	5.2	2.0	virginica
6.2	3.4	5.4	2.3	virginica
5.9	3.0	5.1	1.8	virginica
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>

	body {
	font: 10px sans-serif;
	}

	.bar rect {
	fill: steelblue;
	shape-rendering: crispEdges;
	}

	.bar text {
	fill: #fff;
	}

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

	.dot {
	stroke: #000;
	}

	.inspectorlabel {
	font-size: 14px;
	}

	rect.selectionWindow {

	stroke: darkblue;
	stroke-opacity: 0.8;
	stroke-dasharray: 8px;
	fill: transparent;

	}

	svg {
	-webkit-touch-callout: none;
	-webkit-user-select: none;
	-khtml-user-select: none;
	-moz-user-select: none;
	-ms-user-select: none;
	user-select: none;
	}




	</style>
	<body>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
	<script>

	var attrToHistogram = 'petalLength';
	var inspectorHeightWithMargin = 150;
	var margin = {top: 20, right: 20, bottom: 30, left: 40},
	width = 960 - margin.left - margin.right,
	height = 500 - margin.top - margin.bottom - inspectorHeightWithMargin;

	var inspectorHeight = inspectorHeightWithMargin - margin.top - margin.bottom;

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

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

	var color = d3.scale.category10();

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

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

	var rawsvg = d3.select("body").append("svg");

	var selectedDots = [];

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

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

	var normalizeP = function (p) {
	p[0] = p[0] - margin.left;
	p[1] = p[1] - margin.top;
	return p;
	}

	var setupDraggableWindow = function (data) {

	rawsvg.on("mousedown", function () {

	console.log('mousedown');
	var p = d3.mouse(this);
	p = normalizeP(p);
	svg.append("rect")
	.attr({
	rx: 6,
	ry: 6,
	class: "selectionWindow",
	x: p[0],
	y: p[1],
	width: 0,
	height: 0
	});
	}).on("mousemove", function () {
	var s = svg.select("rect.selectionWindow");

	if (!s.empty()) {
	var p = d3.mouse(this);
	p = normalizeP(p);
	var d = {
	x: parseInt(s.attr("x"), 10),
	y: parseInt(s.attr("y"), 10),
	width: parseInt(s.attr("width"), 10),
	height: parseInt(s.attr("height"), 10)
	};
	var move = {
	x: p[0] - d.x,
	y: p[1] - d.y
	};

	if( move.x < 1 \|\| (move.x*2<d.width)) {
	d.x = p[0];
	d.width -= move.x;
	} else {
	d.width = move.x;
	}

	if( move.y < 1 \|\| (move.y*2<d.height)) {
	d.y = p[1];
	d.height -= move.y;
	} else {
	d.height = move.y;
	}

	s.attr(d);

	var newSelectedDots = [];
	// Add remove selected items from some global.
	d3.selectAll('circle.dot').each( function (da, i) {
	var dataX = x(da.sepalWidth);
	var dataY = y(da.sepalLength);

	if (dataX >= d.x && dataX <= d.x + d.width && dataY >= d.y && dataY <= d.y + d.height) {

	newSelectedDots.push(da);
	}

	});
	renderInspectorHistogram(newSelectedDots);

	}

	}).on('mouseup', function () {
	svg.selectAll( "rect.selectionWindow").remove();
	renderInspectorHistogram([]);
	});

	};


	var setupScatterPlot = function (data) {

	x.domain(d3.extent(data, function(d) { return d.sepalWidth; })).nice();
	y.domain(d3.extent(data, function(d) { return d.sepalLength; })).nice();

	svg.append("g")
	.attr("class", "x axis")
	.attr("transform", "translate(0," + height + ")")
	.call(xAxis)
	.append("text")
	.attr("class", "label")
	.attr("x", width)
	.attr("y", -6)
	.style("text-anchor", "end")
	.text("Sepal Width (cm)");

	svg.append("g")
	.attr("class", "y axis")
	.call(yAxis)
	.append("text")
	.attr("class", "label")
	.attr("transform", "rotate(-90)")
	.attr("y", 6)
	.attr("dy", ".71em")
	.style("text-anchor", "end")
	.text("Sepal Length (cm)")

	svg.selectAll(".dot")
	.data(data)
	.enter().append("circle")
	.attr("class", "dot")
	.attr("r", 3.5)
	.attr("cx", function(d) { return x(d.sepalWidth); })
	.attr("cy", function(d) { return y(d.sepalLength); })
	.style("fill", function(d) { return color(d.species); });

	var legend = svg.selectAll(".legend")
	.data(color.domain())
	.enter().append("g")
	.attr("class", "legend")
	.attr("transform", function(d, i) { return "translate(0," + i * 20 + ")"; });

	legend.append("rect")
	.attr("x", width - 18)
	.attr("width", 18)
	.attr("height", 18)
	.style("fill", color);

	legend.append("text")
	.attr("x", width - 24)
	.attr("y", 9)
	.attr("dy", ".35em")
	.style("text-anchor", "end")
	.text(function(d) { return d; });
	}

	function renderInspectorHistogram (inputData) {

	var text = inputData ? attrToHistogram + ':' : 'Click and drag to select a region.';
	if (inputData && inputData.length === 1) {
	text = 'layout.histogram() seems to be broken with 1 element :(';
	}
	console.log('text: ', text);
	inspectorSvg.selectAll(".inspectorlabel").remove();
	inspectorSvg.append("text")
	.attr("class", "inspectorlabel")
	.attr("x", 10)
	.attr("y", -10)
	.text(text);

	if (!inputData \|\| inputData.length < 2) {
	return;
	}

	var subsetData = inputData;
	var values = subsetData.map(function (data) { return +data[attrToHistogram]; });

	inspectorSvg.selectAll(".bar").remove();
	inspectorSvg.selectAll(".axis").remove();

	var formatCount = d3.format(",.0f");
	var extent = d3.extent(values);

	var xForHistogram = d3.scale.linear()
	.domain(extent)
	.range([0, width]);

	var xForBarWidth = d3.scale.linear()
	.domain([0, extent[1] - extent[0]])
	.range([0, width]);

	var x = d3.scale.linear()
	.domain([0, 1])
	.range([0, width]);

	// Generate a histogram using twenty uniformly-spaced bins.
	var data = d3.layout.histogram()
	.bins(xForHistogram.ticks(20))
	(values);


	var y = d3.scale.linear()
	.domain([0, d3.max(data, function(d) { return d.y; })])
	.range([inspectorHeight, 0]);

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

	var bar = inspectorSvg.selectAll(".bar")
	.data(data)
	.enter().append("g")
	.attr("class", "bar")
	.attr("transform", function(d) { return "translate(" + xForHistogram(d.x) + "," + y(d.y) + ")"; });

	bar.append("rect")
	.attr("x", 1)
	.attr("width", xForBarWidth(data[0].dx) - 1)
	.attr("height", function(d) { return inspectorHeight - y(d.y); });

	bar.append("text")
	.attr("dy", ".75em")
	.attr("y", 6)
	.attr("x", xForBarWidth(data[0].dx) / 2)
	.attr("text-anchor", "middle")
	.text(function(d) { return formatCount(d.y); });

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

	}


	d3.tsv("data.tsv", function(error, data) {
	if (error) throw error;

	data.forEach(function(d) {
	d.sepalLength = +d.sepalLength;
	d.sepalWidth = +d.sepalWidth;
	});

	setupScatterPlot(data);
	setupDraggableWindow(data);
	renderInspectorHistogram();

	});

	</script>