jthomassie/index.html

## index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 13px;
    margin: auto;
    position: relative;
    width: 960px;
    color: #333;
}
text {
    font: 10px sans-serif;
    fill: #666;
}
.axis path,
.axis line {
    fill: none;
    stroke: #666;
    shape-rendering: crispEdges;
}
.form {
    position: relative;
    float: right;
    right: 10px;
    top: 10px;
    margin: 40px 40px 0 0;
}
label{
    margin: 6px;
}
</style>
<div class="form">
    <label><input type="radio" name="mode" value="grouped" checked> Grouped</label>
    <label><input type="radio" name="mode" value="stacked"> Stacked</label>
    <label><input type="radio" name="mode" value="normalized"> Normalized</label>
</div>
<div id="chart"></div>
<script src="http://d3js.org/d3.v3.min.js"></script>

<script>

var n = 5,  // number of layers
    m = 65; // number of samples per layer
var transitionDuration = 250; // transition duration

var stack = d3.layout.stack(),
    layers = stack(d3.range(n).map(function()  { return bumpLayer(m, 0.6); })),
    yGroupMax = d3.max(layers, function(layer) { return d3.max(layer, function(d) { return d.y; }); }),
    yStackMax = d3.max(layers, function(layer) { return d3.max(layer, function(d) { return d.y0 + d.y; }); });

console.log(layers);

var margin = {top: 40, right: 10, bottom: 20, left: 30},
    width = 960 - margin.left - margin.right,
    height = 350 - margin.top - margin.bottom;

var color = d3.scale.linear()
    .domain([0, n - 1])
    .range(["#ffc014", "#990000"]);

var x = d3.scale.ordinal()
    .domain(d3.range(m))
    .rangeRoundBands([0, width], 0.1);

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

var xAxis = d3.svg.axis()
    .scale(x)
    .tickSize(0)
    .tickPadding(6)
    .orient("bottom");

var yAxis = d3.svg.axis()
    .scale(y)
    .tickSize(0)
    .tickPadding(6)
    .orient("left");

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 + ")");

var layer = svg.selectAll(".layer")
    .data(layers)
    .enter().append("g")
    .attr("class", "layer")
    .style("fill", function(d, i) { return color(i); });

var rect = layer.selectAll("rect")
    .data(function(d) { return d; })
    .enter().append("rect")
    .attr("x", function(d, i, j) {
        return x(d.x) + x.rangeBand() / n * j;
    })
    .attr("y", height)
    .attr("width", x.rangeBand() / n)
    .attr("height", 0);

rect.transition()
    .duration(transitionDuration)
    .attr("y", function(d) { return y(d.y); })
    .attr("height", function(d) { return height - y(d.y); });

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

svg.append("g")
    .attr("class", "y axis")
    .call(yAxis);


d3.selectAll("input").on("change", change);

function change() {
    if (this.value === "grouped") {
        transitionGrouped();
    }
    if (this.value === "stacked") {
        transitionStacked();
    }
    if (this.value === "normalized") {
        transitionNormalized();
    }
}

function transitionGrouped() {
    y.domain([0, yGroupMax]).nice();

    rect.transition()
        .duration(transitionDuration)
        .attr("x", function(d, i, j) {
            return x(d.x) + x.rangeBand() / n * j;
        })
        .attr("width", x.rangeBand() / n)
        .transition()
        .attr("y", function(d) {
            return y(d.y);
        })
        .attr("height", function(d) {
            return height - y(d.y);
        });

    // update the y-axis
    svg.select('g.y.axis')
        .transition()
        .duration(transitionDuration)
        .call(yAxis);
}

function transitionStacked() {
    y.domain([0, yStackMax]).nice();

    rect.transition()
        .duration(transitionDuration)
        .attr("y", function(d) {
            return y(d.y0 + d.y);
        })
        .attr("height", function(d) {
            return y(d.y0) - y(d.y0 + d.y);
        })
        .transition()
        .attr("x", function(d) {
            return x(d.x);
        })
        .attr("width", x.rangeBand());

    // update the y-axis
    svg.select('g.y.axis')
        .transition()
        .duration(transitionDuration)
        .call(yAxis);
}

function transitionNormalized() {

    function total(i) {
        var t = 0;
        for (var j = 0; j < n; j++) {
            t = t + layers[j][i].y;
        }
        return t;
    }

    y.domain([0, 100]);
    rect.transition()
        .duration(transitionDuration)
        .attr("y", function(d,i,j) {
            var t = total(i);
            var yy = y((d.y0 + d.y)/t*100);
            return yy;
        })
        .attr("height", function(d,i) {
            var t = total(i);
            var hh = y(d.y0/t*100) - y((d.y0 + d.y)/t*100);
            return hh;
        })
        .transition()
        .attr("x", function(d) {
            return x(d.x);
        })
        .transition()
        .attr("x", function(d) {
            return x(d.x);
        })
        .attr("width", x.rangeBand());

    // update the y-axis
    svg.select('g.y.axis')
        .transition()
        .duration(transitionDuration)
        .call(yAxis);
}


// random data generator - inspired by Lee Byron's test data generator
function bumpLayer(n, o) {

    function bump(a) {
        var x = 1 / ( 0.1 + Math.random() ),
            y = 2 * Math.random() - 0.5,
            z = 10 / ( 0.1 + Math.random() );
        for ( var i = 0; i < n; i++ ) {
            var w = ( i / n - y ) * z;
            a[i] += x * Math.exp(-w * w);
        }
    }

    var a = [], i;
    for (i = 0; i < n; ++i) {
        a[i] = o + o * Math.random();
    }
    for (i = 0; i < 5; ++i) {
        bump(a);
    }
    return a.map(function(d, i) {
        return {x: i, y: Math.max(0, d)};
    });

}


</script>
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>
	body {
	font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
	font-size: 13px;
	margin: auto;
	position: relative;
	width: 960px;
	color: #333;
	}
	text {
	font: 10px sans-serif;
	fill: #666;
	}
	.axis path,
	.axis line {
	fill: none;
	stroke: #666;
	shape-rendering: crispEdges;
	}
	.form {
	position: relative;
	float: right;
	right: 10px;
	top: 10px;
	margin: 40px 40px 0 0;
	}
	label{
	margin: 6px;
	}
	</style>
	<div class="form">
	<label><input type="radio" name="mode" value="grouped" checked> Grouped</label>
	<label><input type="radio" name="mode" value="stacked"> Stacked</label>
	<label><input type="radio" name="mode" value="normalized"> Normalized</label>
	</div>
	<div id="chart"></div>
	<script src="http://d3js.org/d3.v3.min.js"></script>

	<script>

	var n = 5, // number of layers
	m = 65; // number of samples per layer
	var transitionDuration = 250; // transition duration

	var stack = d3.layout.stack(),
	layers = stack(d3.range(n).map(function() { return bumpLayer(m, 0.6); })),
	yGroupMax = d3.max(layers, function(layer) { return d3.max(layer, function(d) { return d.y; }); }),
	yStackMax = d3.max(layers, function(layer) { return d3.max(layer, function(d) { return d.y0 + d.y; }); });

	console.log(layers);

	var margin = {top: 40, right: 10, bottom: 20, left: 30},
	width = 960 - margin.left - margin.right,
	height = 350 - margin.top - margin.bottom;

	var color = d3.scale.linear()
	.domain([0, n - 1])
	.range(["#ffc014", "#990000"]);

	var x = d3.scale.ordinal()
	.domain(d3.range(m))
	.rangeRoundBands([0, width], 0.1);

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

	var xAxis = d3.svg.axis()
	.scale(x)
	.tickSize(0)
	.tickPadding(6)
	.orient("bottom");

	var yAxis = d3.svg.axis()
	.scale(y)
	.tickSize(0)
	.tickPadding(6)
	.orient("left");

	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 + ")");

	var layer = svg.selectAll(".layer")
	.data(layers)
	.enter().append("g")
	.attr("class", "layer")
	.style("fill", function(d, i) { return color(i); });

	var rect = layer.selectAll("rect")
	.data(function(d) { return d; })
	.enter().append("rect")
	.attr("x", function(d, i, j) {
	return x(d.x) + x.rangeBand() / n * j;
	})
	.attr("y", height)
	.attr("width", x.rangeBand() / n)
	.attr("height", 0);

	rect.transition()
	.duration(transitionDuration)
	.attr("y", function(d) { return y(d.y); })
	.attr("height", function(d) { return height - y(d.y); });

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

	svg.append("g")
	.attr("class", "y axis")
	.call(yAxis);



	d3.selectAll("input").on("change", change);

	function change() {
	if (this.value === "grouped") {
	transitionGrouped();
	}
	if (this.value === "stacked") {
	transitionStacked();
	}
	if (this.value === "normalized") {
	transitionNormalized();
	}
	}

	function transitionGrouped() {
	y.domain([0, yGroupMax]).nice();

	rect.transition()
	.duration(transitionDuration)
	.attr("x", function(d, i, j) {
	return x(d.x) + x.rangeBand() / n * j;
	})
	.attr("width", x.rangeBand() / n)
	.transition()
	.attr("y", function(d) {
	return y(d.y);
	})
	.attr("height", function(d) {
	return height - y(d.y);
	});

	// update the y-axis
	svg.select('g.y.axis')
	.transition()
	.duration(transitionDuration)
	.call(yAxis);
	}

	function transitionStacked() {
	y.domain([0, yStackMax]).nice();

	rect.transition()
	.duration(transitionDuration)
	.attr("y", function(d) {
	return y(d.y0 + d.y);
	})
	.attr("height", function(d) {
	return y(d.y0) - y(d.y0 + d.y);
	})
	.transition()
	.attr("x", function(d) {
	return x(d.x);
	})
	.attr("width", x.rangeBand());

	// update the y-axis
	svg.select('g.y.axis')
	.transition()
	.duration(transitionDuration)
	.call(yAxis);
	}

	function transitionNormalized() {

	function total(i) {
	var t = 0;
	for (var j = 0; j < n; j++) {
	t = t + layers[j][i].y;
	}
	return t;
	}

	y.domain([0, 100]);
	rect.transition()
	.duration(transitionDuration)
	.attr("y", function(d,i,j) {
	var t = total(i);
	var yy = y((d.y0 + d.y)/t*100);
	return yy;
	})
	.attr("height", function(d,i) {
	var t = total(i);
	var hh = y(d.y0/t100) - y((d.y0 + d.y)/t100);
	return hh;
	})
	.transition()
	.attr("x", function(d) {
	return x(d.x);
	})
	.transition()
	.attr("x", function(d) {
	return x(d.x);
	})
	.attr("width", x.rangeBand());

	// update the y-axis
	svg.select('g.y.axis')
	.transition()
	.duration(transitionDuration)
	.call(yAxis);
	}




	// random data generator - inspired by Lee Byron's test data generator
	function bumpLayer(n, o) {

	function bump(a) {
	var x = 1 / ( 0.1 + Math.random() ),
	y = 2 * Math.random() - 0.5,
	z = 10 / ( 0.1 + Math.random() );
	for ( var i = 0; i < n; i++ ) {
	var w = ( i / n - y ) * z;
	a[i] += x * Math.exp(-w * w);
	}
	}

	var a = [], i;
	for (i = 0; i < n; ++i) {
	a[i] = o + o * Math.random();
	}
	for (i = 0; i < 5; ++i) {
	bump(a);
	}
	return a.map(function(d, i) {
	return {x: i, y: Math.max(0, d)};
	});

	}


	</script>