amCharts之柱形图_amchart column 颜色

作者：Monodyee | 2024-02-19 12:30:00

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amchart column 颜色

先从官网给的demo开始看，最简单的demo: columnSimple 图如下：

代码如下：


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
    
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
        <title>amCharts examples</title>
        <link rel="stylesheet" href="style.css" type="text/css">
        <script src="../amcharts/amcharts.js" type="text/javascript"></script>         
        <script type="text/javascript">
            var chart;
            var chartData = [{
                country: "USA",
                visits: 4025
            }, {
                country: "China",
                visits: 1882
            }, {
                country: "Japan",
                visits: 1809
            }, {
                country: "Germany",
                visits: 1322
            }, {
                country: "UK",
                visits: 1122
            }, {
                country: "France",
                visits: 1114
            }, {
                country: "India",
                visits: 984
            }, {
                country: "Spain",
                visits: 711
            }, {
                country: "Netherlands",
                visits: 665
            }, {
                country: "Russia",
                visits: 580
            }, {
                country: "South Korea",
                visits: 443
            }, {
                country: "Canada",
                visits: 441
            }, {
                country: "Brazil",
                visits: 395
            }, {
                country: "Italy",
                visits: 386
            }, {
                country: "Australia",
                visits: 384
            }, {
                country: "Taiwan",
                visits: 338
            }, {
                country: "Poland",
                visits: 328
            }];
 
 
            AmCharts.ready(function () {
                chart = new AmCharts.AmSerialChart();//创建一个AmSerialChart对象
                chart.dataProvider = chartData;//dataProvider 数据提供的对象 对应上面的json数据
                chart.categoryField = "country";//X轴上的值
                chart.startDuration = 1;
 
 		//X轴
                var categoryAxis = chart.categoryAxis;
                //categoryAxis.labelRotation =45 ;//X轴下面值的角度


		//Y轴
                var graph = new AmCharts.AmGraph();
                graph.valueField = "visits";//柱形图显示的值
                graph.balloonText = "[[category]]: [[value]]";//鼠标放上所显示的
                graph.type = "column";//Y轴的类型 有line、column、step、smoothedLine、candlestick、ohlc
                graph.lineAlpha = 0;//border透明度
                graph.fillAlphas = 0.8;//柱子的透明度
                chart.addGraph(graph);
                chart.write("chartdiv");
            });
        </script>
    </head>
    
    <body>
        <div id="chartdiv" style="width: 100%; height: 400px;"></div>
    </body>
</html>

AmSerialChart 是画地域图、柱形图等等的对象。

AmGraph 是画Y轴的对象。

如果你想不同的柱子加不同的颜色的话需要做2件事：

1.把json数据多加一个属性 ex:{country:"USA",visits:4025,color: "#F8FF01"}

2.在Y轴的对象上添加一个颜色属性 graph.colorField = "color";

这样就可以得到不同颜色。

第2个demo是双柱形图，如图：


var chart;
 
            var chartData = [{
                dealer: "一月",
                a: 2.6,
                b: 2.7,
               
            }, {
                dealer: "二月",
                a: 2.6,
                b: 2.7,
               
              
            }, {
                dealer: "三月",
                a: 2.6,
                b: 2.7,
                
              
            }, {
                dealer: "四月",
                a: 2.6,
                b: 2.7,
                
              
            }];
 
            AmCharts.ready(function () {
                // SERIALL CHART
                chart = new AmCharts.AmSerialChart();
                chart.dataProvider = chartData;
                chart.categoryField = "dealer";
                //chart.rotate = true;//把柱形图变成横向
 
                var categoryAxis = chart.categoryAxis;
                categoryAxis.gridAlpha = 0.1;//数格的边线透明度
                categoryAxis.axisAlpha = 0.4;//X轴的透明度
                categoryAxis.inside=false;//X轴数值在图里面还是瓦面
                categoryAxis.position = "bottom";//X轴位置
                    
                var valueAxis = new AmCharts.ValueAxis();
                //valueAxis.stackType = "regular";
                valueAxis.gridAlpha = 0;
                valueAxis.axisAlpha = 0.4;
                chart.addValueAxis(valueAxis);
 
                // firstgraph 
                var graph = new AmCharts.AmGraph();
                graph.title = "注册用户";
                //graph.labelText = "[[value]]";
                graph.valueField = "a";//跟json数据中a相对应
                graph.balloonText="[[title]]:[[value]]人" //鼠标放上显示的值
                graph.type = "column";
                graph.lineAlpha = 1;
                graph.fillAlphas = 1;
                graph.lineColor = "#83c417";
                chart.addGraph(graph);
 
                // second graph                              
                graph = new AmCharts.AmGraph();
                graph.title = "停用用户";
                //graph.labelText = "[[value]]";
                graph.valueField = "b";
                graph.balloonText="[[title]]:[[value]]人"
                graph.type = "column";
                graph.lineAlpha = 1;
                graph.fillAlphas = 1;
                //graph.fillColors="#ffc92e"
                graph.lineColor = "#f27324";
                chart.addGraph(graph);


		//控制柱子上鼠标事件的代码，修改tip的样式
		var balloon = chart.balloon;
		balloon.adjustBorderColor = true;
		balloon.horizontalPadding = 10;
		balloon.fontSize = 14;
		balloon.pointerWidth= 5;
		balloon.color = "#000000";
		balloon.cornerRadius = 0;
		balloon.borderThickness=1;
		balloon.borderColor="#999999";
		balloon.borderAlpha=1;
		balloon.fillColor = "#FFFFFF";
             
 
                // LEGEND 用来显示下面分组的代码
                var legend = new AmCharts.AmLegend();
                legend.position = "bottom";
                legend.borderAlpha = 0;
                legend.horizontalGap = 10;
                legend.switchType = "v";//图片上面默认显示对号 
                chart.addLegend(legend);
 
                // WRITE
                chart.write("chartdiv");
            });

amCharts.AmLegend() 对象用来生成分组。
如果想变成一个柱子代表几个数据的话，如下图：

只需要增加valueAxis.stackType = "regular"; 代码就可以了

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