[introd3] scatterplot using iris dataset (template)

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forked from romsson's block: Scatterplot Iris using different marks

forked from anonymous's block: Scatterplot Iris using different marks

forked from romsson's block: [introd3] scatterplot using iris dataset

forked from romsson's block: [introd3] scatterplot using iris dataset (template)

<!DOCTYPE html>
<meta charset="utf-8">
<style>

body {
  font: 10px sans-serif;
}

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

</style>
<body>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>

var margin = {top: 20, right: 20, bottom: 30, left: 40},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

var x = d3.scaleLinear()
	.range([0,width])

var y = d3.scaleLinear()
	.range([0,height])

var r = d3.scaleSqrt()
	.range([5,10])
  
var xAxis = d3.axisBottom()
		.scale(x);

var yAxis = d3.axisLeft()
		.scale(y);

var color = d3.scaleOrdinal(d3.schemeCategory10)
    
var svg = d3.select("body").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 + ")");

d3.csv('iris.csv', function(error, data){

data.forEach(function(d){
    // pre-processing
    d.sepal_length = +d.sepal_length;
    d.sepal_width = +d.sepal_width;
    d.petal_length = +d.petal_length;
    d.petal_width = +d.petal_width;
	});

// update scales
	 x.domain(d3.extent(data,function(d) {
     return d.sepal_length;
   }));

y.domain(d3.extent(data,function(d) {
     return d.sepal_width;
   }));      
  
  r.domain(d3.extent(data,function(d) {
     return d.petal_length;
   }));
  
  svg.append('g')
    .attr('transform', 'translate(0,' + height + ')')
    .attr('class', 'x axis')
    .call(xAxis);

svg.append('g')
    .attr('transform', 'translate(0,0)')
    .attr('class', 'y axis')
    .call(yAxis);

svg.append('text')
   .text ("sepal_length")
   .attr("x", function() {return width;})
   .attr("y", function() {return height - 10;})
   .style("text-anchor", "end")
  
    svg.selectAll("circle").data(data).enter()
      .append("circle")
    		.attr("class", "dot")
    		.attr("r", function(d) {return r(d.petal_length)})
    		.style("fill", function(d) {return color(d.species)})
    		.attr("transform", function(d) {
      		return "translate(" + x(d.sepal_length) + "," + y(d.sepal_width) + ")"; 
    		})
  			
  		.on("click", function(){
      
      		d3.selectAll("circles")
          	.style("stroke-width",0)
      
      		
          d3.select(this)
          	.style("stroke-width",3)
          	.style("stroke", "red")
        })
    
    .on("mouseenter", function(d){
      
      svg
      	.append("text")
      	.style("font-size", "36px")
      	.attr("class","label")
      	.attr("transform", function() {
       		 return "translate(" + x(d.sepal_length) + "," + y(d.sepal_width) + ")"; 
    		})
    
    	.text("(" + d.sepal_length + "," + d.sepal_width + ")")
      
    })
    
    .on("mouseleave", function(){
      d3.selectAll(".label").remove()
    })
      
    
  
	// create legend
  var legend = svg.selectAll(".legend")
  //  .data( ...

// legend.append("rect")
  // ...
  
  // legend.append("text")
	// ...
  
});
  
</script>

Modified http://d3js.org/d3.v4.min.js to a secure url

https://d3js.org/d3.v4.min.js