D3 Examples - D3: Scatterplot

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>D3: Scatterplot</title>
        <script type="text/javascript" src="https://d3js.org/d3.v4.min.js"></script>
        <style type="text/css">
            
            .axis path,
            .axis line {
                fill: none;
                stroke: black;
                shape-rendering: crispEdges;
            }
            
            .axis text {
                font-family: sans-serif;
                font-size: 11px;
            }
​
        </style>
    </head>
    <body>
        
        <script type="text/javascript">
​
            var dataset;
​
            d3.csv("iris.csv", function(data) {
                dataset = data;
                showData();
            });
            
            function showData() {
                                
                var w = window.innerWidth - window.innerWidth/20;
                var h = window.innerHeight - window.innerWidth/20;
                var padding = 40;
                    
                var xScale = d3.scaleLinear()
                    .domain([d3.min(dataset, function(d) { return d.sepal_length; }), d3.max(dataset, function(d) { return d.sepal_length; })])
                    .range([padding, w - padding]);
                    
                var yScale = d3.scaleLinear()
                    .domain([d3.min(dataset, function(d) { return d.sepal_width; }), d3.max(dataset, function(d) { return d.sepal_width; })])
                    .range([h - padding, padding]);
                    
                var xAxis = d3.axisBottom(xScale);
                var yAxis = d3.axisLeft(yScale);
                
                var svg = d3.select("body")
                    .append("svg")
                    .attr("width", w)
                    .attr("height", h);
                    
                var path = svg.selectAll("path")
                    .data(dataset)
                    .enter()
                    .append("path")
​
                path.attr("transform", function(d) {
                    return "translate(" + xScale(d.sepal_length) + ", " + yScale(d.sepal_width) + ")";
                    })
                    .attr("d", d3.symbol().type(function(d){
                        if (d.species == 'setosa'){
                            return d3.symbolCross;
                        }
                        else if (d.species == 'versicolor') {
                            return d3.symbolDiamond;
                        }
                        else {
                            return d3.symbolSquare;
                        }
                    }))
                    .style("fill", function(d){
                        if (d.species == 'setosa'){
                            return "blue"
                        }
                        else if (d.species == 'versicolor') {
                            return "orange"
                        }
                        else {
                            return "red"
                        }
                    })
                    .on("mouseover", function(d) {
                        d3.select(this).style("stroke", "black");
                        d3.select(this).style("stroke-width", 2);
                    })
                    .on("mouseout", function(d) {
                        d3.select(this).transition().duration(500).style("stroke-width", 0);
                    });
                    
                svg.append("line")
                    .style("stroke", "blue")
                    .attr("x1", xScale(4.3))
                    .attr("y1", yScale(2.85))
                    .attr("x2", xScale(6.24))
                    .attr("y2", yScale(4.4));
​
                svg.append("line")
                    .style("stroke", "orange")
                    .attr("x1", xScale(4.3))
                    .attr("y1", yScale(2.24))
                    .attr("x2", xScale(7.9))
                    .attr("y2", yScale(3.39));
​
                svg.append("line")
                    .style("stroke", "red")
                    .attr("x1", xScale(4.3))
                    .attr("y1", yScale(2.45))
                    .attr("x2", xScale(7.9))
                    .attr("y2", yScale(3.26));
                
                svg.append("g")
                    .attr("class", "axis")
                    .attr("transform", "translate(0," + (h - padding) + ")")
                    .call(xAxis);
                
                svg.append("g")
                    .attr("class", "axis")
                    .attr("transform", "translate(" + padding + ",0)")
                    .call(yAxis);
            }
            
        </script>
    </body>
</html>
    