Javascript 如何用js实现talib的LINEARREG_斜率函数？

塔利班的代码：

我想要一个如下的JavaScript函数：

functuin linearRegressionSlope(arr, range) {
  return [...slopeVal]
}

我尝试根据上面的源代码实现一个，但发现结果不一致：

const data = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]
let today = 0
const optInTimePeriod = 5
const SumX = optInTimePeriod * (optInTimePeriod - 1) * 0.5
const SumXSqr =
  (optInTimePeriod * (optInTimePeriod - 1) * (2 * optInTimePeriod - 1)) / 6
const Divisor = SumX * SumX - optInTimePeriod * SumXSqr
const outReal = []
while (today <= data.length - 1) {
  let SumXY = 0
  let SumY = 0
  for (let i = optInTimePeriod; i > 0; i--) {
    SumY += data[today - i]
    SumXY += i * data[today - i]
  }
  outReal.push((optInTimePeriod * SumXY - SumX * SumY) / Divisor)
  today++
}
console.log(outReal)

原始代码的for循环如下

    for(int i = 5; i-- != 0; )
      printf("%d ", i);

打印出来的是：432110

你的循环迭代了54221次。 也许这就是原因

    for(int i = 5; i-- != 0; )
      printf("%d ", i);