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Dojo Chart之常用统计图
很多做web的都知道,在很多web系统中会涉及到一些统计图,例如饼状图,柱状图、趋势图、以及叠加图等。提到这儿,做web的都很熟悉的,jquery的highcharts就能搞定所有的涉及到统计图的功能,highcharts我自己也在经常用,但是呢,用过arcgis for javascript的同志们深深地知道,arcgis的那一套选择的是dojo,并不能很好的与jquery结合使用,所以,还得回归到dojo上面去。dojo的统计图功能,也很强大的,前两篇博文对dojo的统计图做了一定的说明,就算入个门,在本节,重点讲述在地图中常见的统计图的实现方式。
dojo的统计图表在dojox/charting下面。
1、柱状图
在dojo中实现柱状图有两种,一种是横着的,为Bars,一种是竖着的,为Columns,其分别位于dojox/charting/plot2d/Bars和dojox/charting/plot2d/Columns下面。其实现方式为:
<script> require([ "dojox/charting/Chart2D", "dojox/charting/plot2d/ClusteredBars", "dojox/charting/plot2d/ClusteredColumns", "dojox/charting/plot2d/Bars", "dojox/charting/plot2d/Columns", "dojox/charting/axis2d/Default", "dojo/domReady!" ], function( Chart2D ){ var chartData = http://www.mamicode.com/[14000,9200,11811,12000,8662,12000,8668];>上述代码实现的结果为:
Bars
Columns
Bars和Columns实现的只是这种只有一个series的,如果图表中有多个series,我们得用ClusteredBars和ClusteredColumns,聚类柱状图,该类柱状图分别位于dojox/charting/plot2d/ClusteredBars和dojox/charting/plot2d/ClusteredColumns下面。其实现方式与上述柱状图的实现方式类似,如下:<script> require([ "dojox/charting/Chart2D", "dojox/charting/plot2d/ClusteredBars", "dojox/charting/plot2d/ClusteredColumns", "dojox/charting/plot2d/Bars", "dojox/charting/plot2d/Columns", "dojox/charting/axis2d/Default", "dojo/domReady!" ], function( Chart2D ){ var chartData1 = [14000,9200,11811,12000,8662,12000,8668]; var chartData2 = [2000,4440,4000,5987,4567,5677,5678]; var chart = new Chart2D("barchart"); chart.addPlot("default", { type: type, gap: 8 }); var xStr = ["周一","周二","周三","周四","周五","周六","周日"]; // Add axes var myLabelFunc = function(text, value, precision){ return xStr[text-1]; }; chart.addAxis("x", { labelFunc: myLabelFunc }); chart.addAxis("y", { vertical:true, fixLower: "major", fixUpper: "major" }); chart.addSeries("Series1",chartData1); chart.addSeries("Series2",chartData2); chart.render(); }); </script>
上述代码实现的效果如下:
聚类Bars
聚类Colums
2、饼状图
相对于柱状图,饼状图是比较简单的,位于dojox/charting/plot2d/Pie下面,实现方式如下:
<script type="text/javascript"> require([ "dojox/charting/Chart2D", "dojox/charting/plot2d/Pie", "dojox/charting/themes/PlotKit/blue", "dojo/domReady!" ], function( Chart2D, Pie, theme ){ var chartData=http://www.mamicode.com/[>上述代码的实现效果为:
饼状图
3、线状图相对来说,线状图的实现也比较简单,位于dojox/charting/plot2d/Lines下面,实现代码如下:
<script type="text/javascript"> require([ "dojox/charting/Chart2D", "dojox/charting/plot2d/Lines", "dojox/charting/plot2d/StackedAreas", "dojox/charting/themes/PlotKit/blue", "dojox/charting/action2d/Highlight", "dojox/charting/action2d/Tooltip", "dojox/charting/action2d/MoveSlice" , "dojox/charting/widget/Legend", "dojo/domReady!" ], function( Chart2D, Lines, StackedAreas, theme, Highlight, Tooltip, MoveSlice, Legend ) { var chartData = http://www.mamicode.com/[14000,9200,11811,12000,8662,12000,8662];>看代码,线状图的实现方式和柱状图一样,注意,线状图在addPlot的时候,里面有一个参数markers,这个参数设置的是数据点是否显示,显示的效果如下:
显示数据点
不显示数据点
4、区域图
区域图也是一个比较常见的统计图之一,位于dojox/charting/plot2d/Areas下面,其实现代码如下:
<script type="text/javascript"> require([ "dojox/charting/Chart2D", "dojox/charting/plot2d/Lines", "dojox/charting/plot2d/Areas", "dojox/charting/themes/PlotKit/blue", "dojox/charting/action2d/Highlight", "dojox/charting/action2d/Tooltip", "dojox/charting/action2d/MoveSlice" , "dojox/charting/widget/Legend", "dojo/domReady!" ], function( Chart2D, Lines, Areas, theme, Highlight, Tooltip, MoveSlice, Legend ) { var chartData = http://www.mamicode.com/[14000,9200,11811,12000,8662,12000,8662];>5、堆积图
堆积图在dojo里面可以实现很多种类型的,分别为堆积图、堆积区域图、堆积柱状图、堆积线状图。堆积图的实现与各相对应图差不多,下面以堆积柱状图为例,看看堆积图的实现方式:
<script type="text/javascript"> require(["dojox/charting/Chart", "dojox/charting/axis2d/Default", "dojox/charting/plot2d/StackedColumns", "dojox/charting/themes/Wetland" , "dojo/domReady!" ], function(Chart, Default, StackedColumns, Wetland){ var chart = new Chart("chart"); chart.addPlot("default", { type: "StackedColumns", gap: 8 } ); chart.addAxis("x", {fixLower: "major", fixUpper: "major"}); chart.addAxis("y", {vertical: true, fixLower: "major", fixUpper: "major", min: 0}); chart.setTheme(Wetland); chart.addSeries("Series A", [1, 2, 0.5, 1.5, 1, 2.8, 0.4]); chart.addSeries("Series B", [2.6, 1.8, 2, 1, 1.4, 0.7, 2]); chart.addSeries("Series C", [6.3, 1.8, 3, 0.5, 4.4, 2.7, 2]); chart.render(); }); </script>实现的效果如下:
堆积柱状图
此外,dojo还有别的统计图,在此就不在作介绍,后面还会继续介绍,还望后面继续关注。
Dojo Chart之常用统计图