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Co-Authored-By: 狸花猫/Claude-Qwen3.6-Plus 🐾
59 lines
1.8 KiB
JavaScript
59 lines
1.8 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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var pretty_number_1 = require("./pretty-number");
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function pretty(min, max, m) {
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if (m === void 0) { m = 5; }
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if (min === max) {
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return {
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max: max,
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min: min,
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ticks: [min],
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};
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}
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var n = m < 0 ? 0 : Math.round(m);
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if (n === 0)
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return { max: max, min: min, ticks: [] };
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/*
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R pretty:
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https://svn.r-project.org/R/trunk/src/appl/pretty.c
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https://www.rdocumentation.org/packages/base/versions/3.5.2/topics/pretty
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*/
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var h = 1.5; // high.u.bias
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var h5 = 0.5 + 1.5 * h; // u5.bias
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// 反正我也不会调参，跳过所有判断步骤
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var d = max - min;
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var c = d / n;
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// 当d非常小的时候触发，但似乎没什么用
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// const min_n = Math.floor(n / 3);
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// const shrink_sml = Math.pow(2, 5);
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// if (Math.log10(d) < -2) {
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// c = (_.max([ Math.abs(max), Math.abs(min) ]) * shrink_sml) / min_n;
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// }
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var base = Math.pow(10, Math.floor(Math.log10(c)));
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var unit = base;
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if (2 * base - c < h * (c - unit)) {
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unit = 2 * base;
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if (5 * base - c < h5 * (c - unit)) {
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unit = 5 * base;
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if (10 * base - c < h * (c - unit)) {
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unit = 10 * base;
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}
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}
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}
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var nu = Math.ceil(max / unit);
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var ns = Math.floor(min / unit);
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var hi = Math.max(nu * unit, max);
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var lo = Math.min(ns * unit, min);
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var size = Math.floor((hi - lo) / unit) + 1;
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var ticks = new Array(size);
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for (var i = 0; i < size; i++) {
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ticks[i] = pretty_number_1.prettyNumber(lo + i * unit);
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}
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return {
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min: lo,
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max: hi,
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ticks: ticks,
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};
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}
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exports.default = pretty;
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//# sourceMappingURL=pretty.js.map
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