小编Del*_*lso的帖子

我按照这个代码http://jsfiddle.net/amcharts/w8Bcy/来创建我自己的柱形图.我成功了,但现在我想用其他选项来改进这些图表.

实际图表def是:

var chart = AmCharts.makeChart("chartdiv", {
"type": "serial",
    "theme": "none",
    "dataProvider": chartData,
    "valueAxes": [{
    "gridColor": "#FFFFFF",
        "gridAlpha": 0.2,
        "dashLength": 0
}],
    "gridAboveGraphs": true,
    "startDuration": 1,
    "graphs": [{
    "balloonText": "[[category]]: <b>[[value]]</b>",
        "fillAlphas": 0.8,
        "lineAlpha": 0.2,
        "type": "column",
        "valueField": "visits"
}],
    "chartCursor": {
    "categoryBalloonEnabled": false,
        "cursorAlpha": 0,
        "zoomable": false
},
    "categoryField": "country",
    "categoryAxis": {
    "gridPosition": "start",
        "gridAlpha": 0
},
    "exportConfig": {
    "menuTop": 0,
        "menuItems": [{
        "icon": '/lib/3/images/export.png',
            "format": 'png'
    }]
}
});

我有多个列有一些值,我希望列具有基于其值的颜色.我怎样才能改变列颜色？

示例:在x下,列将为红色.在x上方,列将为绿色.

我还想跟踪一条带有参考值的线.

谢谢.