specifying the error of the function

[amlwwalker]

Hi, I have a function to fit such as

func (b Model) Find(dst, params []float64) {
	n := len(b.Data)
	fittedCurve := make([]float64, n)
	invtrig := 0.0

	for i := 0; i < n; i++ {
		invtrig = math.Asinh(math.Sinh(params[2]) * math.Exp(params[0]*float64(i + 1)*2*math.Pi))
		fittedCurve[i] = (1 / (params[0] * params[1])) * (params[2] - invtrig)
		dst[i] = b.Data[i] - fittedCurve[i]
	}
}

However I am not sure if I am constructing the dst value correctly for a least squares algorithm. I cant tell whether I need to do something like dst[i] = math.Sqrt(math.Pow(dst[i])) each loop. Or is the least squares part of the error handled by the algorithm itself?

thanks