插入填充以使点不与y或x轴重叠

Question

插入填充以使点不与y或x轴重叠

cdd*_*cdd 10 d3.js

我在D3中创建了这个情节:http://bl.ocks.org/cddesja/aee65f660c24cb2144fd

我想改变两件事.

1)我想这样做,以便我的点都不与y轴或x轴重叠.我以为我可以transform()用来创建一点缓冲但是在x和y轴线之间产生间隙,这是我不想要的.我该怎么做才能正确？

2)我想摆脱x和y线交叉处的刻度线.我希望,一旦我移动刻度线(以及随后的点和线),这些刻度线就会自动消失.我不知道这是不是真的.

提前致谢.克里斯

Answer 1

Mar*_*ark 15

1)这是由控制域的尺度.由于您的域设置为数据范围,因此轴从那里开始.轻松修复是将您的域名增加到+ - N%的范围.此外,我建议.nice()你删除它,因为你最终会对抗它以控制范围.

// get extents and range
var xExtent = d3.extent(data, function(d) { return d.grade; }),
  xRange = xExtent[1] - xExtent[0],
  yExtent = d3.extent(data, function(d) { return d.bin; }),
  yRange = yExtent[1] - yExtent[0];

// set domain to be extent +- 5%
x.domain([xExtent[0] - (xRange * .05), xExtent[1] + (xRange * .05)]);
y.domain([yExtent[0] - (yRange * .05), yExtent[1] + (yRange * .05)]);

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2.)这由outerTickSize选项控制.只需将其设置为零.

var yAxisLeft = d3.svg.axis()
  .scale(y)
  .ticks(yTicks)
  .outerTickSize(0) //<-- set to zero
  .orient("left");

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完整的代码示例:

<!DOCTYPE html>
<html>
<meta charset="utf-8">
<head>
	<title>Proportion of Students Suspended <body></body> Grade</title>
	<style type="text/css">
body {
  font: 10px Helvetica;
}
.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}
</style>

</head>
<body>
	<script src="//d3js.org/d3.v3.min.js" charset="utf-8"></script>

	<script type="text/javascript">
// Set up the margins
var margin = {top: 50, right: 50, bottom: 30, left: 50},
    width = 1000 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom
    yTicks = 5

var x = d3.scale.linear()
    .range([0, width]);

var y = d3.scale.linear()
    .range([height, 0]);

var xAxisBot = d3.svg.axis()
    .scale(x)
    .outerTickSize(0)
    .orient("bottom");

var xAxisTop = d3.svg.axis()
    .scale(x)
    .tickFormat('')
    .outerTickSize(0)
    .orient("top");

var yAxisLeft = d3.svg.axis()
    .scale(y)
    .ticks(yTicks)
    .outerTickSize(0)
    .orient("left");

var yAxisRight = d3.svg.axis()
    .scale(y)
    .ticks(yTicks)
    .tickFormat('')
    .outerTickSize(0)
    .orient("right");

var line = d3.svg.line()
    .x(function(d) { return x(d.grade); })
    .y(function(d) { return y(d.bin); });

var svg = d3.select("body").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 data = [{"grade":1,"bin":0.0398,"number":14943,"total":3.2306},{"grade":2,"bin":0.0605,"number":14128,"total":3.3778},{"grade":3,"bin":0.0777,"number":13590,"total":3.4621},{"grade":4,"bin":0.103,"number":13147,"total":3.7474},{"grade":5,"bin":0.1207,"number":12936,"total":3.7055},{"grade":6,"bin":0.202,"number":12857,"total":5.2757},{"grade":7,"bin":0.2534,"number":12962,"total":5.7908},{"grade":8,"bin":0.2561,"number":13362,"total":5.7759},{"grade":9,"bin":0.1873,"number":16618,"total":5.8429},{"grade":10,"bin":0.168,"number":14996,"total":5.4448},{"grade":11,"bin":0.1178,"number":13119,"total":4.3997},{"grade":12,"bin":0.0605,"number":12061,"total":3.8986}];

  var xExtent = d3.extent(data, function(d) { return d.grade; }),
      xRange = xExtent[1] - xExtent[0],
      yExtent = d3.extent(data, function(d) { return d.bin; }),
      yRange = yExtent[1] - yExtent[0];

  x.domain([xExtent[0] - (xRange * .05), xExtent[1] + (xRange * .05)]);
  y.domain([yExtent[0] - (yRange * .05), yExtent[1] + (yRange * .05)]);

  svg.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + height + ")")
      .call(xAxisBot)
    .append("text")
      .attr("class", "label")
      .attr("x", width/2)
      .attr("y", 28)
      .style("text-anchor", "end")
      .text("Grade");

  svg.append("g")
      .attr("class", "x axis")
      .call(xAxisTop);

  svg.append("g")
      .attr("class", "y axis")
      .call(yAxisLeft)
    .append("text")
      .attr("class", "label")
      .attr("transform", "rotate(-90)")
      .attr("y", -40)
      .attr("x", -(height / 5))
      .attr("dy", ".71em")
      .style("text-anchor", "end")
      .text("Proportion of Students Suspended at Least Once");

  svg.append("g")
      .attr("class", "y axis")
      .attr("transform", "translate(" + width + ", 0)")
      .call(yAxisRight);

  svg.append("path")
      .datum(data)
      .attr("class", "line")
      .attr("d", line)
      .style("fill", "none")
      .style("stroke", "#3B3A35")
      .style("stroke-width", "1.5px");



  svg.selectAll(".dot")
      .data(data)
      .enter().append("circle")
      .attr("class", "dot")
      .attr("r", function(d) { return 10; })
      .attr("cx", function(d) { return x(d.grade); })
      .attr("cy", function(d) { return y(d.bin); })
      .attr("transform", "translate(0, 0)")
      .on("mouseover", function(d) {

          //Get this bar's x/y values, then augment for the tooltip
          var xPosition = parseFloat(d3.select(this).attr("cx")) + 0;
          var yPosition = parseFloat(d3.select(this).attr("cy")) + 0;

        d3.select(this)
            .transition()
            .duration(500)
            .style("fill-opacity", .35)
            .attr("r", 20)
         })
      .on("mouseout", function() {
          //Hide the tooltip
          d3.select(this)
            .transition()
            .duration(500)
            .style("fill-opacity", 1)
            .attr("r", function(d) { return 10; });
         })    
      .style("fill", "#3B3A35")
      .style("stroke", "#3B3A35")
      .style("stroke-width", "1.2px");
</script>
</body>
</html>

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