ml-gsd/src/algorithms/firstDerivative.ts

Global Spectral Deconvolution

import type { PeakData } from './PeakData.ts';
import { getMinMaxIntervalsDy } from './getMinMaxIntervals.ts';
import { getPeakFromIntervals } from './getPeaksFromIntervals.ts';
import { xGetCrossZeroPoints } from './xGetCrossZeroPoints.ts';

export function firstDerivative(input: PeakData) {
  const { y, x, dY, dX, yData, yThreshold, ddY } = input;
  const crossDy = xGetCrossZeroPoints(input);
  const { intervalL, intervalR } = getMinMaxIntervalsDy(y, x, dY, dX);

  return getPeakFromIntervals({
    minData: crossDy,
    intervalL,
    intervalR,
    x,
    yData,
    yThreshold,
    ddY,
  });
}