c3js中的数据聚合
Data aggregation in c3js
是否有聚合 C3 图表中数据的选项?当 JSON 包含具有相同类别的多个数据元素时,数据在图表中绘制为多个点,而在图表中它应该聚合并显示为单个点。
附件是 C3 图表和预期的图表格式。
在示例中: "name 1" 在 300 处显示单个点作为上传,其中离子 C3 在 200 处显示一个点,在 100 处显示另一个点。
使用的代码:
var chart = c3.generate({
bindto:'#png-container',
data: {
json: [
{name: 'name1', upload: 200, download: 200, total: 400},
{name: 'name1', upload: 100, download: 300, total: 400},
{name: 'name2', upload: 300, download: 200, total: 500},
{name: 'name3', upload: 400, download: 100, total: 500},
],
keys: {
x: 'name', // it's possible to specify 'x' when category axis
value: ['upload', 'download'],
},
groups: [
['name']
]
},
axis: {
x: {
type: 'category'
}
}
});
以上代码的输出:
预期输出:
据我所知,c3 中没有内置。不过,您可以使用 d3 的嵌套运算符来聚合 json 数据,然后再将其传递给 c3。
var json = [
{name: 'name1', upload: 200, download: 200, total: 400},
{name: 'name1', upload: 100, download: 300, total: 400},
{name: 'name2', upload: 300, download: 200, total: 500},
{name: 'name3', upload: 400, download: 100, total: 500},
];
var agg = function (json, nestField) {
var nested_data = d3.nest()
.key(function(d) { return d[nestField]; })
.rollup(function(leaves) {
// Work out the fields we're not nesting by
var keys = d3.merge (leaves.map (function(leaf) { return d3.keys(leaf); }));
var keySet = d3.set(keys);
keySet.remove (nestField);
var dataFields = keySet.values();
// total these fields up
// console.log(leaves, dataFields); // just for testing
var obj = {};
dataFields.forEach (function (dfield) {
obj[dfield] = d3.sum(leaves, function(d) {return d[dfield];});
});
return obj;
})
.entries(json);
// return to original json format
var final_data = nested_data.map (function(nestd) {
nestd.values[nestField] = nestd.key;
return nestd.values;
});
return final_data;
};
var chart = c3.generate({
bindto:'#png-container',
data: {
json: agg(json, "name"),
keys: {
x: 'name', // it's possible to specify 'x' when category axis
value: ['upload', 'download'],
},
groups: [
['name']
]
},
axis: {
x: {
type: 'category'
}
}
});
https://jsfiddle.net/8uofn7pL/2/
哎呀,链接错了fiddle那里
是否有聚合 C3 图表中数据的选项?当 JSON 包含具有相同类别的多个数据元素时,数据在图表中绘制为多个点,而在图表中它应该聚合并显示为单个点。 附件是 C3 图表和预期的图表格式。 在示例中: "name 1" 在 300 处显示单个点作为上传,其中离子 C3 在 200 处显示一个点,在 100 处显示另一个点。
使用的代码:
var chart = c3.generate({
bindto:'#png-container',
data: {
json: [
{name: 'name1', upload: 200, download: 200, total: 400},
{name: 'name1', upload: 100, download: 300, total: 400},
{name: 'name2', upload: 300, download: 200, total: 500},
{name: 'name3', upload: 400, download: 100, total: 500},
],
keys: {
x: 'name', // it's possible to specify 'x' when category axis
value: ['upload', 'download'],
},
groups: [
['name']
]
},
axis: {
x: {
type: 'category'
}
}
});
以上代码的输出:
预期输出:
据我所知,c3 中没有内置。不过,您可以使用 d3 的嵌套运算符来聚合 json 数据,然后再将其传递给 c3。
var json = [
{name: 'name1', upload: 200, download: 200, total: 400},
{name: 'name1', upload: 100, download: 300, total: 400},
{name: 'name2', upload: 300, download: 200, total: 500},
{name: 'name3', upload: 400, download: 100, total: 500},
];
var agg = function (json, nestField) {
var nested_data = d3.nest()
.key(function(d) { return d[nestField]; })
.rollup(function(leaves) {
// Work out the fields we're not nesting by
var keys = d3.merge (leaves.map (function(leaf) { return d3.keys(leaf); }));
var keySet = d3.set(keys);
keySet.remove (nestField);
var dataFields = keySet.values();
// total these fields up
// console.log(leaves, dataFields); // just for testing
var obj = {};
dataFields.forEach (function (dfield) {
obj[dfield] = d3.sum(leaves, function(d) {return d[dfield];});
});
return obj;
})
.entries(json);
// return to original json format
var final_data = nested_data.map (function(nestd) {
nestd.values[nestField] = nestd.key;
return nestd.values;
});
return final_data;
};
var chart = c3.generate({
bindto:'#png-container',
data: {
json: agg(json, "name"),
keys: {
x: 'name', // it's possible to specify 'x' when category axis
value: ['upload', 'download'],
},
groups: [
['name']
]
},
axis: {
x: {
type: 'category'
}
}
});
https://jsfiddle.net/8uofn7pL/2/
哎呀,链接错了fiddle那里