Hi! I am trying to use a 3-parametric Weibull model. I used mselect to find the best-fit model which was W1.3 in one and W2.3 in another case. When searching the internet for formulas, I only find a formula for W1.3, which is:
f(x) = 0 + (d-0)\exp(-\exp(b(\log(x)-e))) But what is the formula for W2.3? And why is the first term written 0+(d-0) and not just d? For me this doesn't make sense... Anyone who can help? Thnaks in advance! Ecotox -- View this message in context: http://r.789695.n4.nabble.com/DRC-package-Weibull-W1-3-and-W2-3-where-is-the-difference-tp4667690.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.
