MarkovMatrix.js

import { compose, countBy, divide, filter, groupBy, head, last, toLower, map, prop, sum, values } from 'ramda';

const sumValues = compose(sum, values);

export function countByFrom(input) {
  return compose(
    map(countBy(last)),
    groupBy(head),
    filter((x) => {
      return x.length > 1;
    })
  )(input);
}

export const probablize = map((row) => {
  const total = sumValues(row);
  return map((val) => {
    return divide(val, total);
  }, row);
});