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Linear Curve Fitting

Now I understand the problem,

You know the thing is you told me to compute the initial parameters in this way in order to reduce the time of fitting,

But when we consider the process of computing the initial parameters in the sequence of structure, then it takes more time than just using incorrect initial parameters. Isn’t it?

That’s why I put it outside.Smiley Sad

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No, calculating the initial parameters like that will only take microseconds and will not significantly change the timing.
 
In addition, calculating good initial parameters IS an essential part of the fitting procedure. This method ensures that the initial paramters are close to the real values and thus the fitting converges MUCH FASTER than if you would give it initial parameters that are not as good. Bad estimates would cause a significant increase in the number of iterations needed to converge and thus cause a huge increase in fitting time, or could even cause the fitting to fail.
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