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Co-Authored-By: 狸花猫/Claude-Qwen3.6-Plus 🐾
51 lines
1.6 KiB
JavaScript
51 lines
1.6 KiB
JavaScript
/**
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* 计算几分位 https://github.com/simple-statistics/simple-statistics/blob/master/src/quantile_sorted.js
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* @param x 数组
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* @param p 百分比
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*/
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function quantileSorted(x, p) {
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var idx = x.length * p;
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/*if (x.length === 0) { // 当前场景这些条件不可能命中
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throw new Error('quantile requires at least one value.');
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} else if (p < 0 || p > 1) {
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throw new Error('quantiles must be between 0 and 1');
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} else */
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if (p === 1) {
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// If p is 1, directly return the last element
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return x[x.length - 1];
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}
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else if (p === 0) {
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// If p is 0, directly return the first element
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return x[0];
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}
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else if (idx % 1 !== 0) {
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// If p is not integer, return the next element in array
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return x[Math.ceil(idx) - 1];
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}
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else if (x.length % 2 === 0) {
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// If the list has even-length, we'll take the average of this number
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// and the next value, if there is one
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return (x[idx - 1] + x[idx]) / 2;
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}
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else {
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// Finally, in the simple case of an integer value
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// with an odd-length list, return the x value at the index.
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return x[idx];
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}
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}
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export default function calculateTicks(cfg) {
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var tickCount = cfg.tickCount, values = cfg.values;
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if (!values || !values.length) {
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return [];
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}
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var sorted = values.slice().sort(function (a, b) {
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return a - b;
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});
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var ticks = [];
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for (var i = 0; i < tickCount; i++) {
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var p = i / (tickCount - 1);
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ticks.push(quantileSorted(sorted, p));
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}
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return ticks;
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}
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//# sourceMappingURL=quantile.js.map
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