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我试图获取基于this示例运行的条形图。无法使用d3.js从json数据创建条形图
<body>
</body>
<script>
var width = 960, height = 500;
var margin = {top: 20, right: 20, bottom: 30, left: 40};
//data
var data = [ {"x":"A","y":0.15}, {"x":"B","y":0.10}, {"x":"C","y":0.35} ];
//x and y Scales
var xScale = d3.scale.ordinal()
.rangeRoundBands([0, width], .1);
var yScale = d3.scale.linear()
.range([height, 0]);
//x and y Axes
var xAxis = d3.svg.axis()
.scale(xScale)
.orient("bottom");
var yAxis = d3.svg.axis()
.scale(yScale)
.orient("left")
.ticks(10, "%");
//create svg container
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 + ")");
//create bars
d3.selectAll(".bar")
.data(data)
.enter()
.append("rect")
.attr("class", "bar")
.attr("x", function(d) { return xScale(d.letter); })
.attr("width", xScale.rangeBand())
.attr("y", function(d) { return yScale(d.frequency); })
.attr("height", function(d) { return height - yScale(d.frequency); });
//drawing the x axis on svg
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
//drawing the y axis on svg
svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Frequency");
</script>
我看到的只是Y轴,没有别的。我错过了什么?
谢谢。我分叉你的演示[这里](http://jsfiddle.net/7Pm6f/1/) 我试图添加一个转换。但它似乎并不奏效。 – John
矩形没有'cx'或'cy'属性。您需要更新最初设置的属性(以及坐标轴):http://jsfiddle.net/7Pm6f/2/ –
谢谢。我认为transition()需要介于data()和enter()之间,以便过渡效果发生,但您的代码令我惊讶。 :) – John