jquery走势图，求助，急

很多绘图插件都可以画啊，如google chart 网页绘图

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title>Flot Examples</title>
    <link href="layout.css" rel="stylesheet" type="text/css">
    
    <script language="javascript" type="text/javascript" src="../jquery.js"></script>
    <script language="javascript" type="text/javascript" src="../jquery.flot.js"></script>
</head>
    <body>
    <h1>Flot Examples</h1>    <div id="placeholder" style="width:600px;height:300px"></div>    <p>Flot supports lines, points, filled areas, bars and any
    combinations of these, in the same plot and even on the same data
    series.</p><script type="text/javascript">
/*
* jQuery.flot.dashes
*
* options = {
*   series: {
*     dashes: {
*
*       // show
*       // default: false
*       // Whether to show dashes for the series.
*       show: <boolean>,
*
*       // lineWidth
*       // default: 2
*       // The width of the dashed line in pixels.
*       lineWidth: <number>,
*
*       // dashLength
*       // default: 10
*       // Controls the length of the individual dashes and the amount of
*       // space between them.
*       // If this is a number, the dashes and spaces will have that length.
*       // If this is an array, it is read as [ dashLength, spaceLength ]
*       dashLength: <number> or <array[2]>
*     }
*   }
* }
*/
(function($){

  function init(plot) {      plot.hooks.drawSeries.push(function(plot, ctx, series) {

        if (!series.dashes.show) {
            return;
        }

        var plotOffset = plot.getPlotOffset();

        function plotDashes(datapoints, xoffset, yoffset, axisx, axisy) {

          var points = datapoints.points,
              ps = datapoints.pointsize,
              prevx = null,
              prevy = null,
              dashRemainder = 0,
              dashOn = true,
              dashOnLength,
              dashOffLength;

          if (series.dashes.dashLength[0]) {
            dashOnLength = series.dashes.dashLength[0];
            if (series.dashes.dashLength[1]) {
              dashOffLength = series.dashes.dashLength[1];
            } else {
              dashOffLength = dashOnLength;
            }
          } else {
            dashOffLength = dashOnLength = series.dashes.dashLength;
          }

          ctx.beginPath();

          for (var i = ps; i < points.length; i += ps) {

            var x1 = points[i - ps],
                y1 = points[i - ps + 1],
                x2 = points[i],
                y2 = points[i + 1];

            if (x1 == null || x2 == null) continue;            // clip with ymin
            if (y1 <= y2 && y1 < axisy.min) {
              if (y2 < axisy.min) continue;   // line segment is outside
              // compute new intersection point
              x1 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
              y1 = axisy.min;
            } else if (y2 <= y1 && y2 < axisy.min) {
              if (y1 < axisy.min) continue;
              x2 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
              y2 = axisy.min;
            }            // clip with ymax
            if (y1 >= y2 && y1 > axisy.max) {
              if (y2 > axisy.max) continue;
              x1 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
              y1 = axisy.max;
            } else if (y2 >= y1 && y2 > axisy.max) {
              if (y1 > axisy.max) continue;
              x2 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
              y2 = axisy.max;
            }            // clip with xmin
            if (x1 <= x2 && x1 < axisx.min) {
              if (x2 < axisx.min) continue;
              y1 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
              x1 = axisx.min;
            } else if (x2 <= x1 && x2 < axisx.min) {
              if (x1 < axisx.min) continue;
              y2 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
              x2 = axisx.min;
            }            // clip with xmax
            if (x1 >= x2 && x1 > axisx.max) {
              if (x2 > axisx.max) continue;
              y1 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
              x1 = axisx.max;
            } else if (x2 >= x1 && x2 > axisx.max) {
              if (x1 > axisx.max) continue;
              y2 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
              x2 = axisx.max;
            }            if (x1 != prevx || y1 != prevy) {
              ctx.moveTo(axisx.p2c(x1) + xoffset, axisy.p2c(y1) + yoffset);
            }

            var ax1 = axisx.p2c(x1) + xoffset,
                ay1 = axisy.p2c(y1) + yoffset,
                ax2 = axisx.p2c(x2) + xoffset,
                ay2 = axisy.p2c(y2) + yoffset,
                dashOffset;

            function lineSegmentOffset(segmentLength) {

              var c = Math.sqrt(Math.pow(ax2 - ax1, 2) + Math.pow(ay2 - ay1, 2));

              if (c <= segmentLength) {
                return {
                  deltaX: ax2 - ax1,
                  deltaY: ay2 - ay1,
                  distance: c,
                  remainder: segmentLength - c
                }
              } else {
                var xsign = ax2 > ax1 ? 1 : -1,
                    ysign = ay2 > ay1 ? 1 : -1;
                return {
                  deltaX: xsign * Math.sqrt(Math.pow(segmentLength, 2) / (1 + Math.pow((ay2 - ay1)/(ax2 - ax1), 2))),
                  deltaY: ysign * Math.sqrt(Math.pow(segmentLength, 2) - Math.pow(segmentLength, 2) / (1 + Math.pow((ay2 - ay1)/(ax2 - ax1), 2))),
                  distance: segmentLength,
                  remainder: 0
                };
              }
            }
            //-end lineSegmentOffset

            do {

              dashOffset = lineSegmentOffset(
                  dashRemainder > 0 ? dashRemainder :
                    dashOn ? dashOnLength : dashOffLength);

              if (dashOffset.deltaX != 0 || dashOffset.deltaY != 0) {
                if (dashOn) {
                  ctx.lineTo(ax1 + dashOffset.deltaX, ay1 + dashOffset.deltaY);
                } else {
                  ctx.moveTo(ax1 + dashOffset.deltaX, ay1 + dashOffset.deltaY);
                }
              }

              dashOn = !dashOn;
              dashRemainder = dashOffset.remainder;
              ax1 += dashOffset.deltaX;
              ay1 += dashOffset.deltaY;

            } while (dashOffset.distance > 0);

            prevx = x2;
            prevy = y2;
          }

          ctx.stroke();
        }
        //-end plotDashes

        ctx.save();
        ctx.translate(plotOffset.left, plotOffset.top);
        ctx.lineJoin = 'round';

        var lw = series.dashes.lineWidth,
            sw = series.shadowSize;

        // FIXME: consider another form of shadow when filling is turned on
        if (lw > 0 && sw > 0) {
          // draw shadow as a thick and thin line with transparency
          ctx.lineWidth = sw;
          ctx.strokeStyle = "rgba(0,0,0,0.1)";
          // position shadow at angle from the mid of line
          var angle = Math.PI/18;
          plotDashes(series.datapoints, Math.sin(angle) * (lw/2 + sw/2), Math.cos(angle) * (lw/2 + sw/2), series.xaxis, series.yaxis);
          ctx.lineWidth = sw/2;
          plotDashes(series.datapoints, Math.sin(angle) * (lw/2 + sw/4), Math.cos(angle) * (lw/2 + sw/4), series.xaxis, series.yaxis);
        }        ctx.lineWidth = lw;
        ctx.strokeStyle = series.color;        if (lw > 0) {
          plotDashes(series.datapoints, 0, 0, series.xaxis, series.yaxis);
        }

        ctx.restore();

      });
      //-end drawSeries hook

  }
  //-end init  $.plot.plugins.push({
    init: init,
    options: {
      series: {
        dashes: {
          show: false,
          lineWidth: 2,
          dashLength: 10
        }
      }
    },
    name: 'dashes',
    version: '0.1b'
  });})(jQuery)
$(function () {
    $.plot($("#placeholder"), [
        {
            data: [[1, 1], [2, 2], [3,3], [4, 4], [5,5]],
            lines: { show: true },
            points: { show: true }
        },
        {
            data: [[5, 5], [6, 3], [7, 2], [8, 6], [9, 9]],
            lines: { show: false},
            points: { show: true },
            dashes: { show: true }
        }
    ]);
});
</script> </body>
</html>

sina用的也是别人的flash绘图的，open flash chart，不过进行了修改flash地址
http://data.house.sina.com.cn/images/price_trend/open-flash-chart-new.swf数据源
{
"elements":[
{"type":"line"//折线图，其他类型可以去 http://teethgrinder.co.uk/open-flash-chart-2/area-hollow.php 这里看，很多种
,"colour":"#003299"
,"font-size":10
,"width":2
,"dot-style":{"type":"hollow-dot","colour":"#003299","dot-size":4,"halo-size":1}
,"valueStyle":[1,1,0,1]//这个是控制顶点是否显示圆圈用的，1为圆圈，0为虚线点
,"values":[17000,20650,18500,16350]
,"betweenStyle":[1,1,0,0]//控制顶点之间显示的是实现还是虚线用的，1为实线，0为虚线
,"localLetter":[]
,"localLetterIndex":[]
,"localLetterOver":[]
,"line-style":{"style":"free","on":2,"off":5}
}]//end elements
,"x_axis":{"rotate":"vertical","offset":"false","stroke":0,"colour":"#c6d9fd","grid-colour":"#dddddd","min":0,"steps":1,"labels":{"labels":["2012-07","2012-08","2012-09","2012-10"]}}
,"y_axis":{"min":14000,"max":22000,"stroke":1,"colour":"#003299","grid_colour":"#dddddd","steps":500}
,"bg_colour":"#ffffff"
}自己按照数据结构修改下配置就好了

调试易

jquery走势图，求助，急

解决方案 »