bizcharts
Version:
bizcharts
43 lines • 1.57 kB
JavaScript
var __assign = (this && this.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
// 只列举常用的函数，复杂的推荐使用第三方类库。
import _forIn from '@antv/util/lib/for-in';
import sum from './sum';
import warn from 'warning';
import partition from './partition';
/**
* 百分比计算, 不支持重复数据统计
* @param data object[] 数据源
* @param field string 被统计的值
* @param as string 生成的百分比字段名
* @param groupBy : string | string[] 将数据分组后再计算百分比
*/
export default (function (data, field, as, groupBy) {
var result = [];
var groups = groupBy ? partition(data, groupBy) : { _data: data };
_forIn(groups, function (group) {
var totalSum = sum(group.map(function (row) { return row[field]; }));
warn(totalSum !== 0, "Invalid data: total sum of field ".concat(field, " is 0!"));
_forIn(group, function (item) {
var resultRow = __assign({}, item);
if (totalSum === 0) {
resultRow[as] = 0;
}
else {
resultRow[as] = item[field] / totalSum;
}
result.push(resultRow);
});
});
return result;
});
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