README.md

## README.md

      
        

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              README.md
            
          
        
      
    
  
    A bar chart was inserted inside a circle. Implementation achieved by having the origin of the arc at π (6 o'clock position), and have all values going to the right of that position be translated laterally to make room for the rects. Initial code  adapted from Mike Bostock's "Arc Tween (clock)". 

  

  

## index.html
<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8">
		<title>Rect in a Circle</title>
		<script src="http://d3js.org/d3.v3.min.js"></script>
  </head>

  <style type="text/css">
  	#chartArea {
			border: 2px dashed black;
			height: 400px;
			width: 700px;
		}
		path {
		  fill-rule: evenodd;
		  fill: #aaa;
		  fill-opacity: .7;
		  stroke: #666;
		  stroke-width: 5.5px;
		}
		rect {
			fill-rule: evenodd;
			fill: gold;
			stroke: #666;
		  stroke-width: 5px;
		}
  </style>

	<body>
		<div id="chartArea"></div>
	</body>

<script type="text/javascript">
	var divH = parseInt( d3.select("#chartArea").style("height") );
  var divW = parseInt( d3.select("#chartArea").style("width") );

	var margin = {top: 10, right: 10, bottom: 10, left: 10};
	var w = divW - margin.left - margin.right;
		h = divH - margin.top - margin.bottom;
		smallestDim = h < w ? h : w;

	var fields = [//larger the order value -> farther inside
	  {side: "left", value: 35, size: 60, order: 0},
	  {side: "left", value: 50, size: 60, order: 1},
	  {side: "left", value: 8, size: 24, order: 2},
	  {side: "left", value: 23, size: 24, order: 3},
	  {side: "right", value: 60, size: 60, order: 0},
	  {side: "right", value: 45, size: 60, order: 1},
	  {side: "right", value: 20, size: 24, order: 2},
	];

	var svg = d3.select("#chartArea").append("svg:svg")
	    .attr("width", w + margin.left + margin.right)
	    .attr("height", h + margin.top + margin.bottom)
	  .append("svg:g")
	    .attr("transform", "translate(" + margin.left + "," +(margin.top + smallestDim/2)+ ")");

	//rect start
	var rectData = [ 5, 10, 13, 19, 21, 25, 22, 18, 15, 13];
	var xScale = d3.scale.ordinal()
		.domain(d3.range(rectData.length))
		.rangeRoundBands([0, w - smallestDim], 0.05);
	var yScale = d3.scale.linear()
		.domain([0, d3.max(rectData)])
		.range([0, h]);
	svg.selectAll("rect")
		.data(rectData)
		.enter()
		.append("rect")
		.attr({
			x: function(d, i) { return xScale(i); },
			y: function(d) { return h - yScale(d) ; },
			width: xScale.rangeBand(),
			height: function(d){ return yScale(d); },
			transform: function(d,i){
				return "translate(" + smallestDim/2 + "," + (-smallestDim/2) + ")";
			}
		});
	//rect end

	//arc start
	var outerRadiusInit = smallestDim / 2;
	var arcWidth = 35;
	var innerRadiusInit = outerRadiusInit - arcWidth;

	var arc = d3.svg.arc()
    .innerRadius(function(d) { return innerRadiusInit - d.order * arcWidth ; })
    .outerRadius(function(d) { return outerRadiusInit - d.order * arcWidth ; })
    .startAngle(Math.PI)
    .endAngle(function(d,i) {
    	if(d.side === "left")
    		return (d.value / d.size) * Math.PI + Math.PI;
    	else return Math.PI - (d.value / d.size) * Math.PI;
    });

	for(var i = 0; i < fields.length; i++)
		fields[i].previous = fields[i].value;

	var path = svg.selectAll("path")
	    .data(fields.filter(function(d) { return d.value; }))

	path.enter().append("svg:path")
    .attr("transform", function(d, i) {
    	if(d.side === "left")
    		return "translate(" + smallestDim/2 + ",0)";
    	else return "translate(" + (w - smallestDim/2) + ",0)";
    })
    .attr("d", arc);
  //arc end
</script>
</html>

## thumbnail.png

      
        

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              thumbnail.png