Hi guys, I have a data-set that fits well into a Weibull model y = a-b*exp(-c*x^d). I want to estimate the parameters of the coefficients a, b, c and d, given x and y. Can you guys help me?
Just as an example, I fit the data y <- c(1,2,3,4,10,20) and x <- c(1,7,14,25,29,30) According to this model above, and using the software CurveExpert, and I got the estimates of a (2.95),b (2.90),c (2.82e-2) and d (2.97). This is just a sample data but I would like to do it on R because I can loop multiple times through all my files. I would also like to fit a logistic model y = a/(1+b*exp-c*x) Can you help me???? Thanks -- View this message in context: http://r.789695.n4.nabble.com/Fitting-my-data-to-a-Weibull-model-tp3780169p3780169.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
