我正在尝试使用路径而不是某些分组数据中的条形图制作柱形图。下面是我打算使用的数据结构。 数据:产品详细信息包括按日期(dyear)排列的产品(名称),计数值1或-1,具体取决于它们是从库存中添加还是从库存中删除。
dyear,名称,值 y1,AAA,1 y1,BBB,1 y2,CCC,1 y3,DDD,-1 y4,EEE,-1 y5,FFF,-1 y5,GGG,1 y5,HHH,1 y6,KKK,-1 y7,MMM,-1 y8,NNN,1 y9,PPP,1 y10,RRR,-1 y10,TTT,-1 y10,SSS,-1 y11,UUU,-1 y11,vvv,-1
我创建了一个柱形图,并根据该值将路径附加为向上或向下箭头。我按日期对产品进行分组之后。 @GerardoFurtado和@Mark的演示非常出色,但是我无法为此目的智能地对其进行翻译。
Making a grouped bar chart when my groups are varied sizes?
我开始在 http://plnkr.co/edit/9VY54mlZbE3mvMKQWHqU?p=preview
但是作为d3.js的新手,我花了3周的时间才能做到这一点。
是否可以添加不同数量的项目大小的日期组?
非常感谢所有帮助。
d3.js
d3.csv(“ data.csv”,类型,函数(错误,数据){ 如果(错误)抛出错误;
// Transform data (i.e., finding cumulative values and total) for easier charting
var cumulative = 0;
for (var i = 0; i < data.length; i++) {
data[i].start = cumulative;
cumulative += data[i].value;
data[i].end = cumulative;
data[i].class = (data[i].value >= 0) ? 'positive' : 'negative'
}
/* data.push({
name: 'Total',
end: cumulative,
start: 0,
class: 'total'
})*/
;
x0.domain(data.map(function(d) {
return d.name;
}));
y.domain(d3.extent(data, function(d) {
return d.end;
})).nice();
// add the x Axis
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis)
.append("text")
.attr("x", width / 2)
.attr("y", margin.bottom - 5);
// add the y Axis
svg.append("g")
.attr("class", "y axis")
.call(yAxis);
// append the rectangles for the bar chart
var bar = svg.selectAll(".bar")
.data(data)
.enter()
.append("path")
.attr("class", "bar")
.style('fill', function(d, i) {
return d.value < 0 ? colorLower : colorHigher;
})
.attr("d", function(d) {
var pathData;
var xStart = x0(d.name) + x0.bandwidth() / 2;
var yStart = Math.abs(y(d.start));
var yStart2 = Math.abs(y(d.end));
var arrowSize = x0.bandwidth() / 2; {
if (d.value > 0) {
var yEnd = Math.abs(y(d.end)) + arrowSize;
// Draw arrow pointing up if value is positive
pathData = "M " + xStart + " " + yStart + " " +
"L " + (xStart - arrowSize / 4) + " " + yStart + " " +
"L " + (xStart - arrowSize / 4) + " " + (yEnd - arrowSize / 2) + " " +
"L " + (xStart - arrowSize / 2) + " " + (yEnd - arrowSize / 2) + " " +
"L " + xStart + " " + (yEnd - arrowSize) + " " +
"L " + (xStart + arrowSize / 2) + " " + (yEnd - arrowSize / 2) + " " +
"L " + (xStart + arrowSize / 4) + " " + (yEnd - arrowSize / 2) + " " +
"L " + (xStart + arrowSize / 4) + " " + yStart + " z";
}
// Draw arrow pointing down if value is negative
else if (d.value < 0) {
var yEnd = Math.abs(y(d.end) - y(d.start));
pathData = "M " + xStart + " " + yStart + " " +
"L " + (xStart + arrowSize / 4) + " " + yStart + " " +
"L " + (xStart + arrowSize / 4) + " " + (yStart + yEnd - arrowSize / 2) + " " +
"L " + (xStart + arrowSize / 2) + " " + (yStart + yEnd - arrowSize / 2) + " " +
"L " + xStart + " " + (yStart + yEnd) + " " +
"L " + (xStart - arrowSize / 2) + " " + (yStart + yEnd - arrowSize / 2) + " " +
"L " + (xStart - arrowSize / 4) + " " + (yStart + yEnd - arrowSize / 2) + " " +
"L " + (xStart - arrowSize / 4) + " " + yStart + " z";
}
}
return pathData;
});