D3 Examples - Exercise module 5

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>Creating SVG Elements from Data</title>
        <script type="text/javascript" src="https://d3js.org/d3.v3.js"></script>
        <style type="text/css">
            
            body {
                background-color: white;
            }
            
            h1 {
                font-size: 24px;
                margin: 0;
            }
            
            p {
                font-size: 14px;
                margin: 10 px 0 0 0;
            }
​
            svg {
                background-color: white;
            }
            
            circle:hover {
                fill: orange;
            }
            
            .axis path,
            .axis line {
                fill: none;
                stroke: grey;
                shape-rendering: crispEdges;
            }
            
            .axis text{
                fill: grey;
                font-size: 11px;
                font-family: sans-serif;
            }
​
​
        </style>
    </head>
    <body>        
        <H1>Grant applications</H1>
        <p>This scatter plot displays grant applications for events organized in the Provence of Groningen in the period 2011-2014. On the x axis the grant amount in euro's is displayed and on the y axis the number of people that visited the event.</p>
        <script type="text/javascript">     
​
            var w = 500;           
            var h = 400;              
            var padding = [20, 10, 50, 70]; // Top, right, bottom, left
            
            var xScale = d3.scale.linear().range([padding[3], w - padding[1] - padding [3]]);
            var yScale = d3.scale.linear().range([padding[0], h - padding[2]]);
            
            var xAxis = d3.svg.axis().scale(xScale).orient("bottom");
                
            var yAxis = d3.svg.axis().scale(yScale).orient("left");
​
            var svg = d3.select("body")
                        .append("svg")
                        .attr("width", w)
                        .attr("height", h);
          
            d3.csv("evenementen.csv", function(dataset) {
                
                xScale.domain([d3.min(dataset, function(d){ return +d.verleend_bedrag}), d3.max(dataset, function(d){ return +d.verleend_bedrag})]);    
                yScale.domain([d3.max(dataset, function(d){ return +d.aantal_bezoekers}), d3.min(dataset, function(d){ return +d.aantal_bezoekers})]); 
                
​
                svg.selectAll("circle")
                    .data(dataset)
                    .enter()
                    .append("circle")
                    .filter(function(d) { return d.verleend_bedrag > 0 }) 
                    .attr({
                        cx: function(d) {return xScale(+d.verleend_bedrag);},
                        cy: function(d) {return yScale(+d.aantal_bezoekers);},
                        r: 0.1,
                        fill: "steelblue"
                    })
                    .append("title")
                    .text(function(d) {
                        return "Aanvraag: " + d.aanvraag + "\nVerleend bedrag: € " + d.verleend_bedrag + "\nAantal bezoekers: " + d.aantal_bezoekers;
                    });
                
               svg.selectAll("circle")
                    .sort(function(a, b) {
                        return d3.ascending(+a.verleend_bedrag, +b.verleend_bedrag);
                    })
                    .transition()
                    .delay(function(d, i) {
                        return i * 5;
                    })
                    .duration(2000)
                    .attr("r", 2); 
                
                svg.append("g")
                    .attr("class", "x axis")
                    .attr("transform", "translate(0,"+ (h - padding[2] + 0) + ")")      
                    .call(xAxis)
                    .append("text")
                    .attr("class", "label")
                    .attr("x", w - 80)
                    .attr("y", -6)
                    .style("text-anchor", "end")
                    .text("Verleende subsidie in euro's");
                
                
                svg.append("g")
                    .attr("class", "y axis")
                    .attr("transform", "translate(" + (padding[3] - 0) + ",0)")    
                    .call(yAxis)       
                    .append("text")
                    .attr("class", "label")
                    .attr("transform", "rotate(-90)")
                    .attr("x", -20)
                    .attr("y", 6)
                    .attr("dy", ".71em") 
                    .style("text-anchor", "end")
                    .text("Aantal bezoekers");                               
            });
​
​
        </script>
​
    </body>
</html>
    