@thi.ng/fuzzy/strategies/bisector.js

Fuzzy logic operators & configurable rule inferencing engine

import { fit } from "@thi.ng/math/fit";
import { __defaultOpts } from "./opts.js";
const bisectorStrategy = (opts) => {
  let { samples } = __defaultOpts(opts);
  return (fn, [min, max]) => {
    const delta = (max - min) / samples;
    let sum = [];
    for (let i = 0, acc = 0; i <= samples; i++) {
      acc += fn(min + i * delta);
      sum.push(acc);
    }
    if (!sum.length) return min;
    const mean = sum[samples] * 0.5;
    for (let i = 1; i <= samples; i++) {
      if (sum[i] >= mean) {
        return fit(
          mean,
          sum[i - 1],
          sum[i],
          min + (i - 1) * delta,
          min + i * delta
        );
      }
    }
    return min;
  };
};
export {
  bisectorStrategy
};