@thi.ng/viz/axis/linear.js

Declarative, functional & multi-format data visualization toolkit based around @thi.ng/hiccup

import { fit } from "@thi.ng/math/fit";
import { inRange } from "@thi.ng/math/interval";
import { roundTo } from "@thi.ng/math/prec";
import { mergeDeepObj } from "@thi.ng/object-utils/merge-deep";
import { filter } from "@thi.ng/transducers/filter";
import { range } from "@thi.ng/transducers/range";
import { axisDefaults } from "./common.js";
const linearScale = ([d1, d2], [r1, r2]) => (x) => fit(x, d1, d2, r1, r2);
const linearAxis = (src) => {
  const spec = mergeDeepObj(axisDefaults(), src);
  !spec.scale && (spec.scale = linearScale(spec.domain, spec.range));
  return spec;
};
const linearTicks = (step) => ([d1, d2]) => [
  ...filter(
    (x) => inRange(x, d1, d2),
    range(roundTo(d1, step), d2 + step, step)
  )
];
export {
  linearAxis,
  linearScale,
  linearTicks
};