I fits a long data series with a complex model by NonlinearModelFit:
fitnlm = NonlinearModelFit[...]
Then I can use fitnlm["BestFitParameters"] to get parameters, use fitnlm["Response"] to view original data. By the way, Length@fitnlm["Response"] gives 3603 so it is not a very long data series. However, when I try to run
fitnlm["FitResiduals"]
It seems that the mathematica core keeps running forever and didn't return an answer. The fitnlm["FitResiduals"] should have same Length as fitnlm["Response"]. Is it because that FitResiduals is not stored in fitnlm and will be calculated every time I run fitnlm["FitResiduals"]? But calculating FitResiduals should not be more difficult than run fitnlm = NonlinearModelFit[...], the later takes several seconds while the former takes forever, what's wrong?
