【发布时间】：2017-08-01 21:38:46
【问题描述】：
在我的 d3 条形图中，我应该有 Y 轴动态刻度和整数值的网格线（没有刻度和十进制值的网格线）。最高条的顶部也应该有刻度线和网格线。
在我的示例图表中，我将最大值传递给 y 轴域函数，如果最大值未达到下一个范围，我如何确保多一行并打勾。
Fiddle One 这里第二个柱的总值为 53，所以我期待在 55 处再出现一个刻度线。
Fiddle Two对于同一张图表，如果数据低于10，它会带有小数点的线条，如2.5、3.5等。如何排除这些线条。
这里的刻度是根据值计算的。
// Setup svg using Bostock's margin convention
var margin = {top: 20, right: 160, bottom: 35, left: 30};
var width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
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 + ")");
/* Data in strings like it would be if imported from a csv */
var data = [
{ year: "2006", redDelicious: "10", mcintosh: "15", oranges: "9", pears: "6" },
{ year: "2007", redDelicious: "12", mcintosh: "18", oranges: "9", pears: "14" },
{ year: "2008", redDelicious: "05", mcintosh: "20", oranges: "8", pears: "2" },
{ year: "2009", redDelicious: "01", mcintosh: "15", oranges: "5", pears: "4" },
{ year: "2010", redDelicious: "02", mcintosh: "10", oranges: "4", pears: "2" },
{ year: "2011", redDelicious: "03", mcintosh: "12", oranges: "6", pears: "3" },
{ year: "2012", redDelicious: "04", mcintosh: "15", oranges: "8", pears: "1" },
{ year: "2013", redDelicious: "06", mcintosh: "11", oranges: "9", pears: "4" },
{ year: "2014", redDelicious: "10", mcintosh: "13", oranges: "9", pears: "5" },
{ year: "2015", redDelicious: "16", mcintosh: "19", oranges: "6", pears: "9" },
{ year: "2016", redDelicious: "19", mcintosh: "17", oranges: "5", pears: "7" },
];
var parse = d3.time.format("%Y").parse;
// Transpose the data into layers
var dataset = d3.layout.stack()(["redDelicious", "mcintosh", "oranges", "pears"].map(function(fruit) {
return data.map(function(d) {
return {x: parse(d.year), y: +d[fruit]};
});
}));
// Set x, y and colors
var x = d3.scale.ordinal()
.domain(dataset[0].map(function(d) { return d.x; }))
.rangeRoundBands([10, width-10], 0.02);
var y = d3.scale.linear()
.domain([0, d3.max(dataset, function(d) { return d3.max(d, function(d) { return d.y0 + d.y; }); })])
.range([height, 0]);
var colors = ["b33040", "#d25c4d", "#f2b447", "#d9d574"];
// Define and draw axes
var yAxis = d3.svg.axis()
.scale(y)
.orient("left")
.tickSize(-width, 0, 0)
.tickFormat(d3.format("d"));
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom")
.tickFormat(d3.time.format("%Y"));
svg.append("g")
.attr("class", "y axis")
.call(yAxis);
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
// Create groups for each series, rects for each segment
var groups = svg.selectAll("g.cost")
.data(dataset)
.enter().append("g")
.attr("class", "cost")
.style("fill", function(d, i) { return colors[i]; });
var rect = groups.selectAll("rect")
.data(function(d) { return d; })
.enter()
.append("rect")
.attr("x", function(d) { return x(d.x); })
.attr("y", function(d) { return y(d.y0 + d.y); })
.attr("height", function(d) { return y(d.y0) - y(d.y0 + d.y); })
.attr("width", x.rangeBand())
.on("mouseover", function() { tooltip.style("display", null); })
.on("mouseout", function() { tooltip.style("display", "none"); })
.on("mousemove", function(d) {
var xPosition = d3.mouse(this)[0] - 15;
var yPosition = d3.mouse(this)[1] - 25;
tooltip.attr("transform", "translate(" + xPosition + "," + yPosition + ")");
tooltip.select("text").text(d.y);
});
// Draw legend
var legend = svg.selectAll(".legend")
.data(colors)
.enter().append("g")
.attr("class", "legend")
.attr("transform", function(d, i) { return "translate(30," + i * 19 + ")"; });
legend.append("rect")
.attr("x", width - 18)
.attr("width", 18)
.attr("height", 18)
.style("fill", function(d, i) {return colors.slice().reverse()[i];});
legend.append("text")
.attr("x", width + 5)
.attr("y", 9)
.attr("dy", ".35em")
.style("text-anchor", "start")
.text(function(d, i) {
switch (i) {
case 0: return "Anjou pears";
case 1: return "Naval oranges";
case 2: return "McIntosh apples";
case 3: return "Red Delicious apples";
}
});
// Prep the tooltip bits, initial display is hidden
var tooltip = svg.append("g")
.attr("class", "tooltip")
.style("display", "none");
tooltip.append("rect")
.attr("width", 30)
.attr("height", 20)
.attr("fill", "white")
.style("opacity", 0.5);
tooltip.append("text")
.attr("x", 15)
.attr("dy", "1.2em")
.style("text-anchor", "middle")
.attr("font-size", "12px")
.attr("font-weight", "bold");
【问题讨论】：
标签： javascript html css d3.js charts