Ooops, I hit the wrong key... So here is the rest of my previous message...
Hi Gilles, > > Does anyone object to the estimated error be defined as > > errors[i] = FastMath.sqrt(covar[i][i]); > > ? > > > Best regards, > Gilles > I'm not an expert on parameter estimation, but I'm not sure about the removal of the c prefactor in the above expression. See for example NR, chapter 15. In particular, equation 15.6.4 might be of interest. I also found this thread http://www.physicsforums.com/showthread.php?t=47534 which certainly does not provide a definite answer, but the formula suggests that c should stay. Again, I'm not claiming your suggestion is wrong, I would just like to find a reference which clearly states the right answer... One way to check the formula would be to test against another software. I know that gnuplot provides error estimates on the parameters, I'm happy to run it with the data set of your choice. Best regards, Sébastien --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
