ramnathv/README.md

## README.md

      
    Raw
  

              README.md
            
          
    The scatterplot matrix visualizations pairwise correlations for multi-dimensional data; each cell in the matrix is a scatterplot. This example uses Anderson's data of iris flowers on the Gaspé Peninsula. Scatterplot matrix design invented by J. A. Hartigan; see also R and GGobi. Data on Iris flowers collected by Edgar Anderson and published by Ronald Fisher.

  
## flowers.csv

          
            disp
            hp
            drat
            species

            
              160
              110
              3.9
              6

            
              160
              110
              3.9
              6

            
              108
              93
              3.85
              4

            
              258
              110
              3.08
              6

            
              360
              175
              3.15
              8

            
              225
              105
              2.76
              6

            
              360
              245
              3.21
              8

            
              146.7
              62
              3.69
              4

            
              140.8
              95
              3.92
              4

            
              167.6
              123
              3.92
              6

            
              167.6
              123
              3.92
              6

            
              275.8
              180
              3.07
              8

            
              275.8
              180
              3.07
              8

            
              275.8
              180
              3.07
              8

            
              472
              205
              2.93
              8

            
              460
              215
              3
              8

            
              440
              230
              3.23
              8

            
              78.7
              66
              4.08
              4

            
              75.7
              52
              4.93
              4

            
              71.1
              65
              4.22
              4

            
              120.1
              97
              3.7
              4

            
              318
              150
              2.76
              8

            
              304
              150
              3.15
              8

            
              350
              245
              3.73
              8

            
              400
              175
              3.08
              8

            
              79
              66
              4.08
              4

            
              120.3
              91
              4.43
              4

            
              95.1
              113
              3.77
              4

            
              351
              264
              4.22
              8

            
              145
              175
              3.62
              6

            
              301
              335
              3.54
              8

            
              121
              109
              4.11
              4

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

svg {
  font: 10px sans-serif;
  padding: 10px;
}

.axis,
.frame {
  shape-rendering: crispEdges;
}

.axis line {
  stroke: #ddd;
}

.axis path {
  display: none;
}

.frame {
  fill: none;
  stroke: #aaa;
}

circle {
  fill-opacity: .7;
}

circle.hidden {
  fill: #ccc !important;
}

.extent {
  fill: #000;
  fill-opacity: .125;
  stroke: #fff;
}

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

var width = 960,
    size = 150,
    padding = 19.5;

var x = d3.scale.linear()
    .range([padding / 2, size - padding / 2]);

var y = d3.scale.linear()
    .range([size - padding / 2, padding / 2]);

var xAxis = d3.svg.axis()
    .scale(x)
    .orient("bottom")
    .ticks(5);

var yAxis = d3.svg.axis()
    .scale(y)
    .orient("left")
    .ticks(5);

var color = d3.scale.category10();

d3.csv("flowers.csv", function(error, data) {
  var domainByTrait = {},
      traits = d3.keys(data[0]).filter(function(d) { return d !== "species"; }),
      n = traits.length;

  traits.forEach(function(trait) {
    domainByTrait[trait] = d3.extent(data, function(d) { return d[trait]; });
  });

  xAxis.tickSize(size * n);
  yAxis.tickSize(-size * n);

  var brush = d3.svg.brush()
      .x(x)
      .y(y)
      .on("brushstart", brushstart)
      .on("brush", brushmove)
      .on("brushend", brushend);

  var svg = d3.select("body").append("svg")
      .attr("width", size * n + padding)
      .attr("height", size * n + padding)
    .append("g")
      .attr("transform", "translate(" + padding + "," + padding / 2 + ")");

  svg.selectAll(".x.axis")
      .data(traits)
    .enter().append("g")
      .attr("class", "x axis")
      .attr("transform", function(d, i) { return "translate(" + (n - i - 1) * size + ",0)"; })
      .each(function(d) { x.domain(domainByTrait[d]); d3.select(this).call(xAxis); });

  svg.selectAll(".y.axis")
      .data(traits)
    .enter().append("g")
      .attr("class", "y axis")
      .attr("transform", function(d, i) { return "translate(0," + i * size + ")"; })
      .each(function(d) { y.domain(domainByTrait[d]); d3.select(this).call(yAxis); });

  var cell = svg.selectAll(".cell")
      .data(cross(traits, traits))
    .enter().append("g")
      .attr("class", "cell")
      .attr("transform", function(d) { return "translate(" + (n - d.i - 1) * size + "," + d.j * size + ")"; })
      .each(plot);

  // Titles for the diagonal.
  cell.filter(function(d) { return d.i === d.j; }).append("text")
      .attr("x", padding)
      .attr("y", padding)
      .attr("dy", ".71em")
      .text(function(d) { return d.x; });

  function plot(p) {
    var cell = d3.select(this);

    x.domain(domainByTrait[p.x]);
    y.domain(domainByTrait[p.y]);

    cell.append("rect")
        .attr("class", "frame")
        .attr("x", padding / 2)
        .attr("y", padding / 2)
        .attr("width", size - padding)
        .attr("height", size - padding);

    cell.selectAll("circle")
        .data(data)
      .enter().append("circle")
        .attr("cx", function(d) { return x(d[p.x]); })
        .attr("cy", function(d) { return y(d[p.y]); })
        .attr("r", 3)
        .style("fill", function(d) { return color(d.species); });

    cell.call(brush);
  }

  var brushCell;

  // Clear the previously-active brush, if any.
  function brushstart(p) {
    if (brushCell !== p) {
      cell.call(brush.clear());
      x.domain(domainByTrait[p.x]);
      y.domain(domainByTrait[p.y]);
      brushCell = p;
    }
  }

  // Highlight the selected circles.
  function brushmove(p) {
    var e = brush.extent();
    svg.selectAll("circle").classed("hidden", function(d) {
      return e[0][0] > d[p.x] || d[p.x] > e[1][0]
          || e[0][1] > d[p.y] || d[p.y] > e[1][1];
    });
  }

  // If the brush is empty, select all circles.
  function brushend() {
    if (brush.empty()) svg.selectAll(".hidden").classed("hidden", false);
  }

  function cross(a, b) {
    var c = [], n = a.length, m = b.length, i, j;
    for (i = -1; ++i < n;) for (j = -1; ++j < m;) c.push({x: a[i], i: i, y: b[j], j: j});
    return c;
  }

  d3.select(self.frameElement).style("height", size * n + padding + 20 + "px");
});

</script>

## thumbnail.png

      
    Raw
  

              thumbnail.png
disp	hp	drat	species
160	110	3.9	6
160	110	3.9	6
108	93	3.85	4
258	110	3.08	6
360	175	3.15	8
225	105	2.76	6
360	245	3.21	8
146.7	62	3.69	4
140.8	95	3.92	4
167.6	123	3.92	6
167.6	123	3.92	6
275.8	180	3.07	8
275.8	180	3.07	8
275.8	180	3.07	8
472	205	2.93	8
460	215	3	8
440	230	3.23	8
78.7	66	4.08	4
75.7	52	4.93	4
71.1	65	4.22	4
120.1	97	3.7	4
318	150	2.76	8
304	150	3.15	8
350	245	3.73	8
400	175	3.08	8
79	66	4.08	4
120.3	91	4.43	4
95.1	113	3.77	4
351	264	4.22	8
145	175	3.62	6
301	335	3.54	8
121	109	4.11	4
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>

	svg {
	font: 10px sans-serif;
	padding: 10px;
	}

	.axis,
	.frame {
	shape-rendering: crispEdges;
	}

	.axis line {
	stroke: #ddd;
	}

	.axis path {
	display: none;
	}

	.frame {
	fill: none;
	stroke: #aaa;
	}

	circle {
	fill-opacity: .7;
	}

	circle.hidden {
	fill: #ccc !important;
	}

	.extent {
	fill: #000;
	fill-opacity: .125;
	stroke: #fff;
	}

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

	var width = 960,
	size = 150,
	padding = 19.5;

	var x = d3.scale.linear()
	.range([padding / 2, size - padding / 2]);

	var y = d3.scale.linear()
	.range([size - padding / 2, padding / 2]);

	var xAxis = d3.svg.axis()
	.scale(x)
	.orient("bottom")
	.ticks(5);

	var yAxis = d3.svg.axis()
	.scale(y)
	.orient("left")
	.ticks(5);

	var color = d3.scale.category10();

	d3.csv("flowers.csv", function(error, data) {
	var domainByTrait = {},
	traits = d3.keys(data[0]).filter(function(d) { return d !== "species"; }),
	n = traits.length;

	traits.forEach(function(trait) {
	domainByTrait[trait] = d3.extent(data, function(d) { return d[trait]; });
	});

	xAxis.tickSize(size * n);
	yAxis.tickSize(-size * n);

	var brush = d3.svg.brush()
	.x(x)
	.y(y)
	.on("brushstart", brushstart)
	.on("brush", brushmove)
	.on("brushend", brushend);

	var svg = d3.select("body").append("svg")
	.attr("width", size * n + padding)
	.attr("height", size * n + padding)
	.append("g")
	.attr("transform", "translate(" + padding + "," + padding / 2 + ")");

	svg.selectAll(".x.axis")
	.data(traits)
	.enter().append("g")
	.attr("class", "x axis")
	.attr("transform", function(d, i) { return "translate(" + (n - i - 1) * size + ",0)"; })
	.each(function(d) { x.domain(domainByTrait[d]); d3.select(this).call(xAxis); });

	svg.selectAll(".y.axis")
	.data(traits)
	.enter().append("g")
	.attr("class", "y axis")
	.attr("transform", function(d, i) { return "translate(0," + i * size + ")"; })
	.each(function(d) { y.domain(domainByTrait[d]); d3.select(this).call(yAxis); });

	var cell = svg.selectAll(".cell")
	.data(cross(traits, traits))
	.enter().append("g")
	.attr("class", "cell")
	.attr("transform", function(d) { return "translate(" + (n - d.i - 1) * size + "," + d.j * size + ")"; })
	.each(plot);

	// Titles for the diagonal.
	cell.filter(function(d) { return d.i === d.j; }).append("text")
	.attr("x", padding)
	.attr("y", padding)
	.attr("dy", ".71em")
	.text(function(d) { return d.x; });

	function plot(p) {
	var cell = d3.select(this);

	x.domain(domainByTrait[p.x]);
	y.domain(domainByTrait[p.y]);

	cell.append("rect")
	.attr("class", "frame")
	.attr("x", padding / 2)
	.attr("y", padding / 2)
	.attr("width", size - padding)
	.attr("height", size - padding);

	cell.selectAll("circle")
	.data(data)
	.enter().append("circle")
	.attr("cx", function(d) { return x(d[p.x]); })
	.attr("cy", function(d) { return y(d[p.y]); })
	.attr("r", 3)
	.style("fill", function(d) { return color(d.species); });

	cell.call(brush);
	}

	var brushCell;

	// Clear the previously-active brush, if any.
	function brushstart(p) {
	if (brushCell !== p) {
	cell.call(brush.clear());
	x.domain(domainByTrait[p.x]);
	y.domain(domainByTrait[p.y]);
	brushCell = p;
	}
	}

	// Highlight the selected circles.
	function brushmove(p) {
	var e = brush.extent();
	svg.selectAll("circle").classed("hidden", function(d) {
	return e[0][0] > d[p.x] \|\| d[p.x] > e[1][0]
	\|\| e[0][1] > d[p.y] \|\| d[p.y] > e[1][1];
	});
	}

	// If the brush is empty, select all circles.
	function brushend() {
	if (brush.empty()) svg.selectAll(".hidden").classed("hidden", false);
	}

	function cross(a, b) {
	var c = [], n = a.length, m = b.length, i, j;
	for (i = -1; ++i < n;) for (j = -1; ++j < m;) c.push({x: a[i], i: i, y: b[j], j: j});
	return c;
	}

	d3.select(self.frameElement).style("height", size * n + padding + 20 + "px");
	});

	</script>