| import {ascending, bisect, quantile} from "d3-array"; |
| import {identity} from "./continuous.js"; |
| import {initInterpolator} from "./init.js"; |
|
|
| export default function sequentialQuantile() { |
| var domain = [], |
| interpolator = identity; |
|
|
| function scale(x) { |
| if (x != null && !isNaN(x = +x)) return interpolator((bisect(domain, x, 1) - 1) / (domain.length - 1)); |
| } |
|
|
| scale.domain = function(_) { |
| if (!arguments.length) return domain.slice(); |
| domain = []; |
| for (let d of _) if (d != null && !isNaN(d = +d)) domain.push(d); |
| domain.sort(ascending); |
| return scale; |
| }; |
|
|
| scale.interpolator = function(_) { |
| return arguments.length ? (interpolator = _, scale) : interpolator; |
| }; |
|
|
| scale.range = function() { |
| return domain.map((d, i) => interpolator(i / (domain.length - 1))); |
| }; |
|
|
| scale.quantiles = function(n) { |
| return Array.from({length: n + 1}, (_, i) => quantile(domain, i / n)); |
| }; |
|
|
| scale.copy = function() { |
| return sequentialQuantile(interpolator).domain(domain); |
| }; |
|
|
| return initInterpolator.apply(scale, arguments); |
| } |
|
|
