Hello. Le lun. 25 mai 2020 à 07:27, Christoph Läubrich <lae...@googlemail.com.invalid> a écrit : > > I'm currently looking into some curve-fitting and have examined the > > basicGuess(WeightedObservedPoint[]) > > in GaussianCurveFitter.ParameterGuesser, and there is one thing I don't > really understand. > > in Line 301 [1] the "halfY" is computed by n (what is the maximal y > value of the observation) + half the sum of n+m (where m is the x value > of the maximum) applying this to some of my datapoints that fit > relatively good as a Gaussian later, it seems that this condition never > works, and the default in the catch clause is used instead. > > I also wonder why x is taken into account for computing the half-y value..
Good question indeed. I don't see why the estimation of the half-width would change depending on the position of the curve along the x-axis. Also it seems that the current code could be made more robust by shifting the abscissa of the maximum height to 0 before performing the rest of the computation. Could you please file a report on the bug-tracking system?[1] Thanks, Gilles [1] https://issues.apache.org/jira/projects/MATH > [...] --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
