Question

我尝试将数据集放入此处的示例中：（http://bl.ocks.org/tjdecke/5558084）。

这是我的d3js：

     var margin = { top: 50, right: 0, bottom: 100, left: 30 },
      width = 600 - margin.left - margin.right,
      height = 430 - margin.top - margin.bottom,
      gridSize = Math.floor(width / 24),
      legendElementWidth = gridSize*2,
      buckets = 9,
      colors =     ["#ffffd9","#edf8b1","#c7e9b4","#7fcdbb","#41b6c4","#1d91c0","#225ea8","#25 3494","#081d58"], // alternatively colorbrewer.YlGnBu[9]
      days = ["Mo", "Tu", "We", "Th", "Fr", "Sa", "Su"],
      times = ["1a", "2a", "3a", "4a", "5a", "6a", "7a", "8a", "9a", "10a", "11a", "12a", "1p", "2p", "3p", "4p", "5p", "6p", "7p", "8p", "9p", "10p", "11p", "12p"];


d3.json("/test/heatmap.php", function(error, data) {
data.forEach(function(d) {
    console.log(d);
    day= +d.day;
    hour= +d.hour;
    value= +d.value;
});
    },
    function(error, data) {
      var colorScale = d3.scale.quantile()
          .domain([0, buckets - 1, d3.max(data, function (d) { return d.value; })])
          .range(colors);
          console.log(d3.max(data, function (d) { return d.value; }))
          ;
console.log("test");

      var svg = d3.select(".wpd3-8-3").append("svg")
          .attr("width", width + margin.left + margin.right)
          .attr("height", height + margin.top + margin.bottom)
          .append("g")
          .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

      var dayLabels = svg.selectAll(".dayLabel")
          .data(days)
          .enter().append("text")
            .text(function (d) { return d; })
            .attr("x", 0)
            .attr("y", function (d, i) { return i * gridSize; })
            .style("text-anchor", "end")
            .attr("transform", "translate(-6," + gridSize / 1.5 + ")")
            .attr("class", function (d, i) { return ((i >= 0 && i <= 4) ? "dayLabel mono axis axis-workweek" : "dayLabel mono axis"); });

      var timeLabels = svg.selectAll(".timeLabel")
          .data(times)
          .enter().append("text")
            .text(function(d) { return d; })
            .attr("x", function(d, i) { return i * gridSize; })
            .attr("y", 0)
            .style("text-anchor", "middle")
            .attr("transform", "translate(" + gridSize / 2 + ", -6)")
            .attr("class", function(d, i) { return ((i >= 7 && i <= 16)      ? "timeLabel mono axis axis-worktime" : "timeLabel mono axis"); });

      var heatMap = svg.selectAll(".hour")
          .data(data)
          .enter().append("rect")
          .attr("x", function(d) { return (d.hour - 1) * gridSize; })
          .attr("y", function(d) { return (d.day - 1) * gridSize; })
          .attr("rx", 4)
          .attr("ry", 4)
          .attr("class", "hour bordered")
          .attr("width", gridSize)
          .attr("height", gridSize)
          .style("fill", colors[0]);

      heatMap.transition().duration(1000)
          .style("fill", function(d) { return colorScale(d.value); });

      heatMap.append("title").text(function(d) { return d.value; });

      var legend = svg.selectAll(".legend")
          .data([0].concat(colorScale.quantiles()), function(d) {      return d; })
          .enter().append("g")
          .attr("class", "legend");

      legend.append("rect")
        .attr("x", function(d, i) { return legendElementWidth * i; })
        .attr("y", height)
        .attr("width", legendElementWidth)
        .attr("height", gridSize / 2)
        .style("fill", function(d, i) { return colors[i]; });

      legend.append("text")
        .attr("class", "mono")
        .text(function(d) { return "≥ " + Math.round(d); })
        .attr("x", function(d, i) { return legendElementWidth * i; })
        .attr("y", height + gridSize);
  });

我的php echo的一个例子：

[{"day":"4","hour":"0","value":"91"},{"day":"7","hour":"0","value":"93"},{"day":"3","hour":"1","value":"71"},{"day":"4","hour":"1","value":"90"},{"day":"3","hour":"2","value":"96"},{"day":"4","hour":"2","value":"89"},{"day":"5","hour":"2","value":"88"},{"day":"3","hour":"3","value":"97"},{"day":"4","hour":"3","value":"88"},{"day":"5","hour":"3","value":"88"},{"day":"6","hour":"3","value":"89"},{"day":"4","hour":"4","value":"86"},{"day":"5","hour":"4","value":"86"},{"day":"6","hour":"4","value":"88"},{"day":"7","hour":"4","value":"91"},{"day":"4","hour":"5","value":"86"},{"day":"6","hour":"5","value":"88"},{"day":"7","hour":"5","value":"91"},{"day":"6","hour":"6","value":"88"},{"day":"7","hour":"6","value":"91"},{"day":"6","hour":"7","value":"86"},{"day":"6","hour":"8","value":"86"},{"day":"6","hour":"9","value":"86"},{"day":"6","hour":"10","value":"86"},{"day":"6","hour":"11","value":"85"},{"day":"3","hour":"12","value":"91"},{"day":"4","hour":"12","value":"82"},{"day":"5","hour":"12","value":"82"},{"day":"6","hour":"12","value":"84"},{"day":"4","hour":"13","value":"82"},{"day":"6","hour":"13","value":"85"},{"day":"6","hour":"14","value":"87"},{"day":"6","hour":"15","value":"88"},{"day":"6","hour":"16","value":"88"},{"day":"6","hour":"17","value":"88"},{"day":"6","hour":"18","value":"88"},{"day":"6","hour":"19","value":"89"},{"day":"6","hour":"20","value":"90"},{"day":"6","hour":"21","value":"91"},{"day":"6","hour":"22","value":"91"},{"day":"6","hour":"23","value":"93"}]

我很难过，因为当我记录d3.json的结果时，它会匹配示例文件的结果。我注意到的是示例中的

console.log(d3.max(data, function (d) { return d.value; }))

加载最大值。当我加载我的值时，console.log似乎不会在d3.json步骤之外打印。

有什么建议吗？经过几天的阅读和实验后，我有点难过。

谢谢！

Answer 1

json调用中有2个函数（一个用于错误，一个用于成功？）。您只需要一个 - 首先检查错误是否存在并进行错误处理。

所以你可以删除这个

function(error, data) {
    data.forEach(function(d) {
        console.log(d);
        day= +d.day;
        hour= +d.hour;
        value= +d.value;
    });
},

除此之外，它主要是好的 - 只需要稍微调整x attr调用 - 你不需要-1

 .attr("x", function (d) { return (d.hour) * gridSize; })

日/小时热图+ mySQL

1 个答案: