biovisualize/README.md

## README.md

      
    Raw
  

              README.md
            
          
    Test for the version of the Lasso on d3-plugins.

  
## 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;
}

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

.dot {
  stroke: #000;
}

.lasso path {
  stroke: rgb(80,80,80);
  stroke-width:2px;
}

.lasso .drawn {
  fill-opacity:.05 ;
}

.lasso .loop_close {
  fill:none;
  stroke-dasharray: 4,4;
}

.lasso .origin {
  fill:#3399FF;
  fill-opacity:.5;
}

.not_possible {
  fill:rgb(200,200,200);
}

.possible {
  fill:#EC888C;
}

</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src = "https://rawgit.com/d3/d3-plugins/master/lasso/lasso.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 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 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 + ")");

// Lasso functions to execute while lassoing
var lasso_start = function() {
  lasso.items()
    .attr("r",3.5) // reset size
    .style("fill",null) // clear all of the fills
    .classed({"not_possible":true,"selected":false}); // style as not possible
};

var lasso_draw = function() {
  // Style the possible dots
  lasso.items().filter(function(d) {return d.possible===true})
    .classed({"not_possible":false,"possible":true});

  // Style the not possible dot
  lasso.items().filter(function(d) {return d.possible===false})
    .classed({"not_possible":true,"possible":false});
};

var lasso_end = function() {
  // Reset the color of all dots
  lasso.items()
     .style("fill", function(d) { return color(d.species); });

  // Style the selected dots
  lasso.items().filter(function(d) {return d.selected===true})
    .classed({"not_possible":false,"possible":false})
    .attr("r",7);

  // Reset the style of the not selected dots
  lasso.items().filter(function(d) {return d.selected===false})
    .classed({"not_possible":false,"possible":false})
    .attr("r",3.5);

};

// Create the area where the lasso event can be triggered
var lasso_area = svg.append("rect")
                      .attr("width",width)
                      .attr("height",height)
                      .style("opacity",0);

// Define the lasso
var lasso = d3.lasso()
      .closePathDistance(75) // max distance for the lasso loop to be closed
      .closePathSelect(true) // can items be selected by closing the path?
      .hoverSelect(true) // can items by selected by hovering over them?
      .area(lasso_area) // area where the lasso can be started
      .on("start",lasso_start) // lasso start function
      .on("draw",lasso_draw) // lasso draw function
      .on("end",lasso_end); // lasso end function

// Init the lasso on the svg:g that contains the dots
svg.call(lasso);

d3.tsv("data.tsv", function(error, data) {
  data.forEach(function(d) {
    d.sepalLength = +d.sepalLength;
    d.sepalWidth = +d.sepalWidth;
  });

  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("id",function(d,i) {return "dot_" + i;}) // added
      .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); });

  lasso.items(d3.selectAll(".dot"));

  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; });

});

</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;
	}

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

	.dot {
	stroke: #000;
	}

	.lasso path {
	stroke: rgb(80,80,80);
	stroke-width:2px;
	}

	.lasso .drawn {
	fill-opacity:.05 ;
	}

	.lasso .loop_close {
	fill:none;
	stroke-dasharray: 4,4;
	}

	.lasso .origin {
	fill:#3399FF;
	fill-opacity:.5;
	}

	.not_possible {
	fill:rgb(200,200,200);
	}

	.possible {
	fill:#EC888C;
	}

	</style>
	<body>
	<script src="http://d3js.org/d3.v3.min.js"></script>
	<script src = "https://rawgit.com/d3/d3-plugins/master/lasso/lasso.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 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 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 + ")");

	// Lasso functions to execute while lassoing
	var lasso_start = function() {
	lasso.items()
	.attr("r",3.5) // reset size
	.style("fill",null) // clear all of the fills
	.classed({"not_possible":true,"selected":false}); // style as not possible
	};

	var lasso_draw = function() {
	// Style the possible dots
	lasso.items().filter(function(d) {return d.possible===true})
	.classed({"not_possible":false,"possible":true});

	// Style the not possible dot
	lasso.items().filter(function(d) {return d.possible===false})
	.classed({"not_possible":true,"possible":false});
	};

	var lasso_end = function() {
	// Reset the color of all dots
	lasso.items()
	.style("fill", function(d) { return color(d.species); });

	// Style the selected dots
	lasso.items().filter(function(d) {return d.selected===true})
	.classed({"not_possible":false,"possible":false})
	.attr("r",7);

	// Reset the style of the not selected dots
	lasso.items().filter(function(d) {return d.selected===false})
	.classed({"not_possible":false,"possible":false})
	.attr("r",3.5);

	};

	// Create the area where the lasso event can be triggered
	var lasso_area = svg.append("rect")
	.attr("width",width)
	.attr("height",height)
	.style("opacity",0);

	// Define the lasso
	var lasso = d3.lasso()
	.closePathDistance(75) // max distance for the lasso loop to be closed
	.closePathSelect(true) // can items be selected by closing the path?
	.hoverSelect(true) // can items by selected by hovering over them?
	.area(lasso_area) // area where the lasso can be started
	.on("start",lasso_start) // lasso start function
	.on("draw",lasso_draw) // lasso draw function
	.on("end",lasso_end); // lasso end function

	// Init the lasso on the svg:g that contains the dots
	svg.call(lasso);

	d3.tsv("data.tsv", function(error, data) {
	data.forEach(function(d) {
	d.sepalLength = +d.sepalLength;
	d.sepalWidth = +d.sepalWidth;
	});

	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("id",function(d,i) {return "dot_" + i;}) // added
	.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); });

	lasso.items(d3.selectAll(".dot"));

	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; });

	});

	</script>