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index.html
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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
<title>Canvas Parallel Coordinates</title>
<style type="text/css">
svg {
font: 10px sans-serif;
}
canvas, svg {
position: absolute;
top: 0;
left: 0;
}
table, th, td
{
border-style:solid;
border-right: thin double black;
border-bottom: thin single black;
border-left: none;
border-top: none;
}
#chart {
position: relative;
display: block
width: 100%;
height: 500px;
}
#controls {
position: relative;
display: block
width: 100%;
height: 200px;
}
li
{
display: inline;
list-style-type: none;
padding-right: 1%;
}
#table {
position: relative;
display: block
width: 100%;
height: 300px;
overflow:auto
}
.brush .extent {
fill-opacity: .3;
stroke: #fff;
shape-rendering: crispEdges;
}
line {
stroke-width: 3;
}
path {
stroke-width: 3;
}
.axis line, .axis path {
stroke-width: .5;
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.axis text {
text-shadow: 0 1px 0 #fff;
}
</style>
</head>
<body>
<div id="chart" height="500">
<canvas id="background"></canvas>
<canvas id="foreground"></canvas>
<svg></svg>
</div>
<div id="controls">
</div>
<div id="table">
</div>
<!-- <script type="text/javascript" src="http://mbostock.github.com/d3/d3.v2.js"></script> -->
<script type="text/javascript" src="../lib/d3/d3.v2.min.js"></script>
<script type="text/javascript">
var m = [30, 10, 10, 10],
w = 1280 - m[1] - m[3],
h = 400 - m[0] - m[2];
var x = d3.scale.ordinal().rangePoints([0, w], 1),
y = {};
percentageFormat = d3.format(".0%");
var line = d3.svg.line(),
axis = d3.svg.axis().orient("left").tickFormat(percentageFormat),
background,
foreground;
d3.selectAll("canvas")
.attr("width", w + m[1] + m[3])
.attr("height", h + m[0] + m[2])
.style("padding", m.join("px ") + "px");
foreground = document.getElementById('foreground').getContext('2d');
background = document.getElementById('background').getContext('2d');
foreground.strokeStyle = "rgba(0,100,160,0.8)";
background.strokeStyle = "rgba(100,100,100,0.02)";
var svg = d3.select("svg")
.attr("width", w + m[1] + m[3])
.attr("height", h + m[0] + m[2])
.append("svg:g")
.attr("transform", "translate(" + m[3] + "," + m[0] + ")");
d3.csv("food3.csv", function(csv) {
foodstuff = csv;
var newI = 0;
var controlledVocab = [];
var maxI = 0;
for (xVals in foodstuff[0]) {
if (['max','measure','category','group','english','item'].indexOf(xVals) > -1) {
controlledVocab.push(newI);
if (xVals == 'max') {
maxI = newI;
}
}
newI++;
}
groups = d3.keys(d3.nest()
.key(function(d) { return d.group; })
.map(foodstuff));
// Extract the list of dimensions and create a scale for each.
x.domain(dimensions = d3.keys(foodstuff[0]).filter(function(d) {
return d != "item" && d != "english" && d != "group" && d!= "subcategory" && d != "measure" && d != "max" && (y[d] = d3.scale.linear()
.domain(d3.extent(foodstuff, function(p) { return +(p[d]/p["max"]); }))
.range([h, 0]));
}));
// Render full foreground and background
foodstuff.map(function(d) {
path(d, background);
path(d, foreground);
});
// Add a group element for each dimension.
var g = svg.selectAll(".dimension")
.data(dimensions)
.enter().append("svg:g")
.attr("class", "dimension")
.attr("transform", function(d) { return "translate(" + x(d) + ")"; });
// Add an axis and title.
g.append("svg:g")
.attr("class", "axis")
.each(function(d) { d3.select(this).call(axis.scale(y[d])); })
.append("svg:text")
.attr("text-anchor", "middle")
.attr("y", -9)
.text(String);
// Add and store a brush for each axis.
g.append("svg:g")
.attr("class", "brush")
.each(function(d) { d3.select(this).call(y[d].brush = d3.svg.brush().y(y[d]).on("brush", brush)); })
.selectAll("rect")
.attr("x", -8)
.attr("width", 16);
// Handles a brush event, toggling the display of foreground lines.
var columns = d3.keys(foodstuff[0]);
var table = d3.select("#table").append("table"),
thead = table.append("thead");
tbody = table.append("tbody");
thead.append("tr")
.selectAll("th")
.data(columns)
.enter()
.append("th")
.text(function(column) { return column; });
rows = tbody.selectAll("tr")
.data(foodstuff)
.enter()
.append("tr")
.style("display", null);
//creates a cell for each column in each row
cells = rows.selectAll("td")
.data(function(row) {
return columns.map(function(column) {
return {column: column, value: row[column], maxValue: row["max"]};
});
})
.enter()
.append("td")
// .html(function(d,i) { return controlledVocab.indexOf(i) > -1 ? ''+d.value+'' : percentageFormat(d.value / d.maxValue); });
.html(function(d,i) { return d.value; });
var controls = d3.select("#controls").append("ol").selectAll("li")
.data(groups)
.enter()
.append("li")
.style("float", "left")
.style("width", "100px");
controls
.append("form")
.append("input")
.attr("type", "checkbox")
.attr("value", function(d) { return d; })
.attr("checked", true)
.attr("onchange", function(d) {return "rebuildGroups(this)"});
controls
.append("span")
.html(function(d) { return d; });
});
function brush() {
var actives = dimensions.filter(function(p) { return !y[p].brush.empty(); }),
extents = actives.map(function(p) { return y[p].brush.extent(); });
// Get lines within extents
var selected = [];
foodstuff.map(function(d) {
return actives.every(function(p, i) {
return extents[i][0] <= d[p]/d["max"] && d[p]/d["max"] <= extents[i][1] && groups.indexOf(d["group"]) > -1;
}) ? selected.push(d) : null;
});
// Run just the groups filter if no brush active
if (actives.length == 0) {
foodstuff.map(function(d) {
return groups.indexOf(d["group"]) > -1
? selected.push(d) : null;
});
}
console.log(selected.length);
rows
.style("display", function(d) {
return actives.every(function(p, i) {
return extents[i][0] <= d[p]/d["max"] && d[p]/d["max"] <= extents[i][1] && groups.indexOf(d["group"]) > -1;
}) ? null : "none";
})
// .style("display", function(d,i) {return i < 20 ? "none" : null })
// Render selected lines
foreground.clearRect(0,0,w+1,h+1);
selected.map(function(d) {
path(d, foreground);
});
}
function rebuildGroups(val) {
console.log(val.value);
console.log(val.checked);
if (val.checked == true) {
groups.push(val.value);
}
else {
removeA(groups, val.value);
}
brush();
}
function path(d, ctx) {
ctx.beginPath();
dimensions.map(function(p,i) {
if (i == 0) {
ctx.moveTo(x(p),y[p](d[p]/d["max"]));
} else {
ctx.lineTo(x(p),y[p](d[p]/d["max"]));
}
});
ctx.stroke();
};
function removeA(arr) {
var what, a = arguments, L = a.length, ax;
while (L > 1 && arr.length) {
what = a[--L];
while ((ax= arr.indexOf(what)) !== -1) {
arr.splice(ax, 1);
}
}
return arr;
}
</script>
</body>
</html>