Grouped, Stacked, Scatter and Line

<!DOCTYPE html>
<html>
<head>
<style>    
body {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  margin: auto;
  position: relative;
  width: 960px;
}

text {
  font: 10px sans-serif;
}

.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

form {
  position: absolute;
  right: 10px;
  top: 10px;
}

.line {
  fill: none;
  stroke-width: 3px;
}

</style>
</head>
<body>
<form>
    <label><input type="radio" name="mode" value="grouped"> Grouped </label>
    <label><input type="radio" name="mode" value="stacked" checked> Stacked</label>
    <label><input type="radio" name="mode" value="scatter"> Scatter</label>
    <label><input type="radio" name="mode" value="line"> Line </label>
</form>

var n = 4 // number of layers
var m = 60 // number of data points
var stack = d3.layout.stack()
var layers = stack(d3.range(n).map(function() {return bumpLayer(m, 0.1)}))

var yGroupMax = d3.max(layers, function(column) {return d3.max(column, function(row){return row.y})})
var yScatterMax = d3.max(layers, function(column) {return d3.max(column, function(row) {return row.y})})
var yStackMax = d3.max(layers, function(column) {return d3.max(column, function(row){return row.y + row.y0})})

var margin = {top:40, bottom:20, right:10, left:10}
var svgWidth = 960 - margin.left - margin.right
var svgHeight = 500 - margin.top - margin.bottom

var svg = d3.select("body").append("svg")
			.attr("width", svgWidth + margin.left + margin.right)
			.attr("height", svgHeight + margin.top + margin.bottom)
			.append("g")
			.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
			
			
var xScale = d3.scale.ordinal()
				.domain(d3.range(m))
				.rangeRoundBands([0,svgWidth], 0.05);
				
var yScale = d3.scale.linear()
				.domain([0, yStackMax])
				.range([svgHeight, 0]);
				
var xAxis = d3.svg.axis()
			.scale(xScale)
			.tickSize(0)
			.tickPadding(6)
			.orient("bottom");
			
			
svg.append("g")
	.attr("class", "x axis")
	.attr("transform", "translate(0," + (svgHeight) + ")")
	.call(xAxis);
				
				
var line = d3.svg.line()
    .x(function(d) { return xScale(d.x); })
    .y(function(d) { return yScale(d.y); })
//	.interpolate("basis");

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

//Start with Stacked

var rect = layer.selectAll("rect")
				.data(function(d) {return d})
				.enter()
				.append("rect")
				.attr("x", function(d) {return xScale(d.x)})
				.attr("y", svgHeight)
				.attr("width", xScale.rangeBand())
				.attr("height", 0)
				
rect.transition()
	.delay(function(d,i){ return i*10  } )
	.attr("y", function(d) {return yScale(d.y0 + d.y)})
	.attr("height", function(d){return yScale(d.y0) - yScale(d.y0 + d.y)} )

//for line graph	
var path = layer.append("path")
				.style("fill", "none")
				.attr("class", "line")

d3.selectAll("input").on("change", change);
	
function change()
{
	if (this.value === "grouped")
		{	transitionGrouped(); }
  else if (this.value === "stacked")
		{ transitionStacked();  } 
	else if(this.value === "scatter")
	{ transitionScatter();}
	else if(this.value === "line")
	{ transitionLine();}
}

//Grouped graph
function transitionGrouped()
{
yScale.domain([0, yGroupMax]);		
rect.transition()
      .duration(500)
      .delay(function(d, i) { return i * 10; })			
	  .attr("x", function(d, i, j) { return xScale(d.x) + xScale.rangeBand() / n * j; })
      .attr("width", xScale.rangeBand() / n)
	  .attr("rx", 0)
	  .attr("ry", 0)
	  .transition()
	  .attr("y", function(d) { return yScale(d.y); })
      .attr("height", function(d) { return svgHeight - yScale(d.y); });
	  
	  unwindLine(0)

}

unwindLine(1000)
}

function unwindLine(delay)
//function to undraw the line when we deselect it 
{
	if (lineBefore === true)
	{
		lineBefore === false
		 path.transition()
			.delay(delay)
			.duration(300)
			.ease("linear")
			.attr("stroke-dashoffset", function(d) {return d.totalLength});
	}
}
	
function chooseCol(rowNo)
{
	if(rowNo=== 0){
		return("#e41a1c")
	} else if (rowNo === 1) {
		return("#377eb8")
	} else if(rowNo === 2) {
		return("#4daf4a")
	}  else{
		return ("#984ea3")
	}
} 	
	
	
// Inspired by Lee Byron's test data generator.
function bumpLayer(n, o) {

function bump(a) {
  // x will take values between 0.90909 and 10
    var x = 1 / (.1 + Math.random()),
	//y takes values between -0.5 and 1.5
        y = 2 * Math.random() - .5,
	 //z takes values between 9.0909 and 100
        z = 10 / (.1 + Math.random());
    for (var i = 0; i < n; i++) {
	//(i/10 - y) can take values between -1.5 and 1.5
	//so w takes range between -150 and 150
	//each time the loop goes round, w is incremented by the same amount. 
	//the increment goes up by between 0.90909 and 10 
      var w = (i / n - y) * z;
	   //x += 2  is the same as x = x + 2
		//a[i] = a[i] + ...
      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>
</body>
</html>

https://d3js.org/d3.v3.min.js