【发布时间】：2019-09-23 02:47:04
【问题描述】：
这是我正在使用的 CSV 文件的 sn-p：
id abbr healthcare poverty
1 AL 13.9 19.3
2 AK 15 11.2
3 AZ 14.4 18.2
4 AR 16.3 18.9
5 CA 14.8 16.4
6 CO 12.8 12
7 CT 8.7 10.8
8 DE 8.7 12.5
这是我的 JavaScript 代码：
// @TODO: YOUR CODE HERE!
var svgWidth = 750;
var svgHeight = 500;
var margin = {
top: 20,
right: 40,
bottom: 60,
left: 100
};
var width = svgWidth - margin.left - margin.right;
var height = svgHeight - margin.top - margin.bottom;
// Create an SVG wrapper, append an SVG group that will hold our chart and shift the latter by left and top margins
var svg = d3.select("#scatter")
.append("svg")
.attr("width", svgWidth)
.attr("height", svgHeight);
var chartGroup = svg.append("g")
.attr("transform", `translate(${margin.left}, ${margin.top})`);
// Import Data
d3.csv("data.csv").then(function(censusData) {
// Parse Data & Cast as numbers
censusData.forEach(function(data) {
data.healthcare = +data.healthcare;
data.poverty = +data.poverty;
});
// Create scale functions
var xLinearScale = d3.scaleLinear()
.domain(d3.extent(censusData, d => d.poverty))
.range([0, width]);
var yLinearScale = d3.scaleLinear()
.domain([0, d3.max(censusData, d => d.healthcare)])
.range([height, 0]);
// Create axis functions
var bottomAxis = d3.axisBottom(xLinearScale);
var leftAxis = d3.axisLeft(yLinearScale);
// Append axes to the chart
chartGroup.append("g")
.attr("transform", `translate(0, ${height})`)
.call(bottomAxis);
chartGroup.append("g")
.call(leftAxis);
// Create circles
var circlesGroup = chartGroup.selectAll("Circle")
.data(censusData)
.enter()
.append("circle")
.attr("cx", d => xLinearScale(d.poverty))
.attr("cy", d => yLinearScale(d.healthcare))
.attr("r", "15")
.attr("fill", "rgb(117, 145, 197)")
.attr("opacity", "0.5");
// Add state labels to the points
var circleLabels = circlesGroup.selectAll("text").data(censusData).enter().append("text");
circleLabels
.attr("x", function(d) { return d.poverty; })
.attr("y", function(d) { return d.healthcare; })
.text(function(d) { return d.abbr; })
.attr("font-family", "sans-serif")
.attr("font-size", "5px")
.attr("fill", "white");
// Create axes labels
chartGroup.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 0 - margin.left + 40)
.attr("x", 0 - (height / 2))
.attr("dy", "1em")
.attr("class", "axisText")
.style("text-anchor", "middle")
.text("Lacks Healthcare (%)");
chartGroup.append("text")
.attr("transform", `translate(${width / 2}, ${height + margin.top + 30})`)
.attr("class", "axisText")
.style("text-anchor", "middle")
.text("In Poverty (%)");
// Initialize tooltip
var toolTip = d3.tip()
.attr("class", "tooltip")
.offset([80, -60])
.html(function(d) {
return `${d.state}<br>Poverty: ${d.poverty}<br>Healthcare: ${d.healthcare}<br>`;
});
// Create tooltip in the chart
chartGroup.call(toolTip);
// Create event listeners to display and hide the tooltip
circlesGroup.on("mouseover", function(data) {
toolTip.show(data, this);
})
// onmouseout event
.on("mouseout", function(data, index) {
toolTip.hide(data);
});
});
我试图将它们添加到代码的circleLabels 部分，但无济于事。
谁能告诉我这部分我做错了什么：
// Add state labels to the points
var circleLabels = circlesGroup.selectAll("text").data(censusData).enter().append("text");
circleLabels
.attr("x", function(d) { return d.poverty; })
.attr("y", function(d) { return d.healthcare; })
.text(function(d) { return d.abbr; })
.attr("font-family", "sans-serif")
.attr("font-size", "5px")
.attr("fill", "white");
欢迎提出任何建议或更改。
【问题讨论】：
标签： javascript d3.js label scatter-plot