widgets/heatmap.html at master · xiaolng/widgets · GitHub

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<html>
<body>
	<table>
	<tr>
	  <th> <div id="heatmap"></div> </th>
	  <th> <div id="scatter"></div> </th>
    </tr>
    </table>

</body>

</html>

<!-- load d3.js-->
<script type="text/javascript", src="./js/d3/d3.js"></script>

<script type="text/javascript">
var margin = {top:50, right:50, bottom:50, left:50}
var width = 600 - margin.left - margin.right
var height = 500 - margin.top  - margin.bottom

// append svg to body
var svg = d3.select("#heatmap")
			.append("svg")
			.attr("width", width + margin.left + margin.right)
			.attr("height", height + margin.top + margin.bottom)
			.style("background-color", "rgba(128, 255, 255, 0.2)")
			.append("g")
			.attr("transform", "translate(" + margin.left +", "+ margin.top +")")

// Labels of row and columns
var myGroups = ["A", "B", "C", "D", "E", "F", "G", "H", "I", "J"]
var myVars = ["v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9", "v10"]


//build scales and axis
var x = d3.scaleBand()
			.range([0, width])
			.domain(myGroups)
			.padding(0.01);
svg.append("g")
	.attr("transform", "translate(0, " + height +")")
	.call(d3.axisBottom(x))

var y = d3.scaleBand()
			.range([0, height])
			.domain(myVars)
			.padding(0.01);
svg.append("g")
	.attr("transform", "translate(0, " + 0 +")")
	.call(d3.axisLeft(y))

// colormap
//var cmap = d3.scaleLinear()
//			.range(["white", "#69b3a2"])
//			.domain([0, 100])
var cmap = d3.scaleSequential(d3.interpolateSpectral).domain([100, 0])

//var csvfile = "./data/heatmap_data.csv"
var csvfile = "https://raw.githubusercontent.com/holtzy/D3-graph-gallery/master/DATA/heatmap_data.csv"

var data = d3.csv(csvfile).then(
	function(data){

		svg.selectAll("rect")
		   .data(data)
		   .enter()
		   .append("rect")
		   .attr("x", function(d){return x(d.group)} )
		   .attr("y", function(d){return y(d.variable)} )
		   .attr("width", x.bandwidth() )
		   .attr("height", y.bandwidth() )
		   .style("fill", d=>cmap(d.value))
		   .on("mouseover", mouseover)
		   .on("mouseleave", mouseleave)
		   .style("stroke", "black")
		   .style("stroke-width", 5)
		   .style("stroke-opacity:1.0")

		//   .data(data)
		 //  .enter()
		 //  .append("circle")
		  // .attr("cx", function(d){return x(d.group)} )
		   //.attr("cy", function(d){return y(d.variable)} )
		   //.attr("r", 5)
		   //.style("fill", d=>cmap(d.value))

	}
	)


//add a tooltip
var tooltip = d3.select("body").append("div")
    .style("position", "absolute")
    .style("z-index", "10")
    .style("visibility", "hidden")
    .style("background", "white" )
    .style("opacity", 0.6)

 // mouseover function
 var mouseover = function(d) {
	//console.log( proj( [-d.fieldRa, d.fieldDec] ) )

	  d3.select(this)
        //.style("stroke", "black")
        .style("opacity", 0.5)

    tooltip.style("visibility", "visible")
    		.text([d.group, d.variable, d.value])
    		.style("top", (d3.event.pageY-10)+"px")
	 	   .style("left",(d3.event.pageX+10)+"px")
	 	   .style("opacity", 1)

	if ( d3.selectAll("#dot"+d.group + d.variable).empty() ) {
		svg2.append("circle")
		   .attr("cx",  x(d.group) )
		   .attr("cy", y(d.variable) )
		   .attr("r", 5)
		   .attr("id",  "dot" + d.group + d.variable )
		   .style("fill", cmap(d.value))

		}
		else {
			d3.selectAll("#dot"+d.group + d.variable).style("opacity", 1.0)
		}
		}

var mouseleave = function(d){
	  d3.select(this)
        //.style("stroke", "black")
        .style("opacity", 1)

      d3.selectAll("#dot"+d.group + d.variable).style("opacity", 0.5)

}


// another svg
var svg2 = d3.select("#scatter")
			.append("svg")
			.attr("width", width + margin.left + margin.right)
			.attr("height", height + margin.top + margin.bottom)
			.style("background-color", "rgba(255, 0, 255, 0.2)")
			.append("g")
			.attr("transform", "translate(" + margin.left +", "+ margin.top +")")


</script>