Question

您好我是D3新手，我无法通过触发加载新csv功能的按钮更新地图。我看了类似的帖子，提到我只需要更新用颜色填充地图的部分，并尝试调整它，但点击我的按钮不会影响地图。

这是我的代码：

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>D3: Setting path fills dynamically to generate a choropleth</title>
        <h1>Relation between Managers and Tertiary Education </h1>
        <div id="option1">
            <input type="button"value="Education"onclick="viewEducation()" />
        </div>
        <div id="option2">
            <input type="button"value="Managers"onclick="viewManagers()" />
        </div>
        <script type="text/javascript" src="d3.js"></script>
        <style type="text/css">
            /* No style rules here yet */
        </style>
    </head>
    <body>
        <script type="text/javascript">

            //Width and height
            var w = 1000;
            var h = 600;

            var path = d3.geoPath()
                         .projection(d3.geoMercator()
                         .center([151,-33.5])
                         .scale(17000)
                         .translate([w/2,h/2]));

            //Define quantize scale to sort data values into buckets of color
            var color = d3.scaleQuantize()
                                .range(["rgb(237,248,233)","rgb(200,235,198)", "rgb(186,228,179)","rgb(146,208,140)", "rgb(116,196,118)", "rgb(88,178,100)", "rgb(49,163,84)", "rgb(20,130,60)", "rgb(0,109,44)"])
                                .domain([6274, 39796]);
                                //Colors derived from ColorBrewer, by Cynthia Brewer, and included in
                                //https://github.com/d3/d3-scale-chromatic

            //Create SVG element
            var svg = d3.select("body")
                        .append("svg")
                        .attr("width", w)
                        .attr("height", h);

            //Load in agriculture data
            d3.csv("ManagerPercentage.csv", function(d) { d.value = parseFloat(d.value); parseFloat(d.value1); return d; }, function(data) {

                //Set input domain for color scale

                color.domain([
                    d3.min(data, function(d) { return d.value; }),
                    d3.max(data, function(d) { return d.value; })
                ]);

                //Load in GeoJSON data
                d3.json("australia_adm2.json", function(json) {

                    //Merge the ag. data and GeoJSON
                    //Loop through once for each ag. data value
                    for (var i = 0; i < data.length; i++) {

                        //Grab state name
                        var dataState = data[i].state;

                        //Grab data value, and convert from string to float
                        var dataValue = parseFloat(data[i].value);

                        //Find the corresponding state inside the GeoJSON
                        for (var j = 0; j < json.features.length; j++) {

                            var jsonState = json.features[j].properties.sa4_name11;

                            if (dataState == jsonState) {

                                //Copy the data value into the JSON
                                json.features[j].properties.value = dataValue;

                                //Stop looking through the JSON
                                break;

                            }
                        }
                    }

                    //Bind data and create one path per GeoJSON feature
                    svg.selectAll("path")
                       .data(json.features)
                       .enter()
                       .append("path")
                       .attr("d", path)
                       .style("fill", function(d) {
                            //Get data value
                            var value = d.properties.value;

                            if (value) {
                                //If value exists…
                                return color(value);
                            } else {
                                //If value is undefined…
                                return "#ccc";
                            }
                       });

                });

            });

function viewEducation () {
                    d3.select("option1")
                       d3.csv("EducationPercentage.csv", function(data) {
                                         svg.selectAll("path")
                                         .style("fill", function(d) {
                                         var value = d.properties.value;

                                         if (value) {
                                         return color(value);
                                        } else {
                                         return "#ccc";
                                     }
                                });

                 });
}

function viewManagers () {
                    d3.select("option2")
                       d3.csv("ManagerPercentage.csv", function(data) {
                                         svg.selectAll("path")
                                         .style("fill", function(d) {
                                         var value = d.properties.value;

                                         if (value) {
                                         return color(value);
                                        } else {
                                         return "#ccc";
                                     }
                                });

                 });
             });
}

        </script>
    </body>
</html>

D3 - 更新Choropleth csv以更改颜色映射

0 个答案: