从D3.js中完全相同的数据数组向多个路径添加颜色
这个问题可能有误导性,但我不知道如何说得更准确。 基本上,我的数据如下:从D3.js中完全相同的数据数组向多个路径添加颜色,d3.js,colors,scale,D3.js,Colors,Scale,这个问题可能有误导性,但我不知道如何说得更准确。 基本上,我的数据如下: { "pitcher": 547943, "pitch_type": "CH", "velo": 80.15329032258065, "hmov": 0, "vmov": 0, "name": "hyun-jin-ryu" }, { "pitcher": 547943, "p
{
"pitcher": 547943,
"pitch_type": "CH",
"velo": 80.15329032258065,
"hmov": 0,
"vmov": 0,
"name": "hyun-jin-ryu"
},
{
"pitcher": 547943,
"pitch_type": "CH",
"velo": 80.15329032258065,
"hmov": 12.729861677419354,
"vmov": 5.4084,
"name": "hyun-jin-ryu"
},
{
"pitcher": 547943,
"pitch_type": "CU",
"velo": 72.77105263157895,
"hmov": 0,
"vmov": 0,
"name": "hyun-jin-ryu"
},
{
"pitcher": 547943,
"pitch_type": "CU",
"velo": 72.77105263157895,
"hmov": -13.357961403508773,
"vmov": -13.062238596491229,
"name": "hyun-jin-ryu"
}
我想为每种音高类型得到一条路径,从(hmov[0],vmov[0])或0,0开始,到(hmov[1],vmov[1])。我还创建了一个与“velo”关联的色标,但找不到将其指定给路径笔划的方法。我怀疑这与有2个velo值有关,但不能确定这是否是问题所在
//Loop through each pitch
dataNest.forEach(function(d) {
svg.append("path")
.data([data])
.attr("d", pitchLine(d.values))
.attr("stroke", function(d) { return veloScale(d); }) //Problematic part
.attr("stroke-witdh", 2);
});
完整代码:
const margin = {top: 25, bottom: 25, right: 25, left: 25};
const height = 300 - margin.top - margin.bottom;
const width = 300 - margin.left - margin.right;
//Set Ranges
let x = d3.scaleLinear().range([0, width]);
let y = d3.scaleLinear().range([height, 0]);
let veloScale = d3.scaleSequential(d3.interpolateViridis);
//Set line generator
let pitchLine = d3.line()
.x(function(d) { return x(d.hmov); })
.y(function(d) { return y(d.vmov); });
//Add SVG canvas
let 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 + ")");
///////////////////////////////
//Get the Data
d3.json("ryu.json").then(function(data) {
data.forEach(function(d) {
d.hmov = +d.hmov;
d.vmov = +d.vmov;
d.velo = +d.velo;
});
//Scales
x.domain(d3.extent(data, function(d) { return d.hmov; }));
y.domain(d3.extent(data, function(d) { return d.vmov; }));
veloScale.domain(d3.extent(data, function(d) { return d.velo; }))
//Nesting data
let dataNest = d3.nest()
.key(function(d) { return d.pitch_type; })
.entries(data);
//Loop through each pitch
dataNest.forEach(function(d) {
svg.append("path")
.data([data])
.attr("d", pitchLine(d.values))
.attr("stroke", function(d) { return veloScale(d); })
.attr("stroke-witdh", 2);
});
应该更新代码中循环数据嵌套数组的部分,以便 a) 数据以正确的级别连接,即创建每个路径的dataNest数组和路径基准的d.Value b) stroke Color函数从要映射到颜色的数组中传入值。由于d.values数组中的每个元素可能具有不同的velo值,因此需要决定使用哪一个。下面的示例使用数组中第一个元素的velo值
//Create a separate g element to contain the path, based on the nested array
let pitch = svg.selectAll(".pitch-type")
.data(dataNest)
.enter()
.append("g")
//for each g element, add a path and assign the d.values for that path
pitch.append("path")
.datum(d => d.values)
.attr("d", d => pitchLine(d))
//pass in the velo value to get a colour
.attr("stroke", d => veloScale(d[0].velo))
.attr("stroke-witdh", 2);
let数据=[{
“投手”:547943,
“音高类型”:“CH”,
“速度”:80.1532903225065,
“hmov”:0,
“vmov”:0,
“姓名”:“hyun jin ryu”
},
{
“投手”:547943,
“音高类型”:“CH”,
“速度”:80.1532903225065,
“hmov”:12.729861677419354,
“vmov”:5.4084,
“姓名”:“hyun jin ryu”
},
{
“投手”:547943,
“音高类型”:“CU”,
“velo”:72.77105263157895,
“hmov”:0,
“vmov”:0,
“姓名”:“hyun jin ryu”
},
{
“投手”:547943,
“音高类型”:“CU”,
“velo”:72.77105263157895,
“hmov”:-13.357961403508773,
“vmov”:-13.062238596491229,
“姓名”:“hyun jin ryu”
}]
常量边距={顶部:25,底部:25,右侧:25,左侧:25};
常量高度=300-margin.top-margin.bottom;
常量宽度=300-margin.left-margin.right;
//设定范围
设x=d3.scaleLinear().range([0,width]);
设y=d3.scaleLinear().range([height,0]);
设veloScale=d3.scaleSequential(d3.interpolateViridis);
//固定线路发生器
设pitchLine=d3.line()
.x(函数(d){返回x(d.hmov);})
.y(函数(d){返回y(d.vmov);});
//添加SVG画布
让svg=d3.select(“body”)
.append(“svg”)
.attr(“宽度”,宽度+边距。左侧+边距。右侧)
.attr(“高度”,高度+边距。顶部+边距。底部)
.附加(“g”)
.attr(“转换”,
“翻译(“+margin.left+”,“+margin.top+”);
data.forEach(函数(d){
d、 hmov=+d.hmov;
d、 vmov=+d.vmov;
d、 速度=+d.velo;
});
//天平
x、 域(d3.extent(数据,函数(d){返回d.hmov;}));
y、 域(d3.extent(数据,函数(d){返回d.vmov;}));
域(d3.extent(数据,函数(d){return d.velo;}))
//嵌套数据
让dataNest=d3.nest()
.key(函数(d){返回d.pitch_type;})
.条目(数据);
让pitch=svg。选择All(“.pitch type”)
.数据(数据嵌套)
.输入()
.附加(“g”)
pitch.append(“路径”)
.基准(d=>d.值)
.attr(“d”,d=>俯仰线(d))
.attr(“笔划”,d=>veloScale(d[0].velo))
.attr(“中风”,2)代码>