On Thu, 2009-10-01 at 10:18 -0700, awayguy wrote: > yes, halo thank you. > my measure data: > v2 <- c(0, 2, 4, 6, 6.2, 6.4, 6.6, 6.8, 7, 7.2, 7.4, 7.6, 7.8, 8, 10, 12, > 14) > ph2 <- c(12.10, 11.94, 11.68, 11.11, 10.91, 10.74, 10.47, 9.71, 7.1, 4.24, > 3.3, 3.08, 2.98, 2.86, 2.33, 2.11, 1.98) > > with regards
Ok temp<-data.frame(ph2,v2) > drm(temp,, fct = LL.4()) A 'drc' model. Call: drm(formula = temp, fct = LL.4()) Coefficients: b:(Intercept) c:(Intercept) d:(Intercept) e:(Intercept) 39.420 2.425 11.487 7.002 -- Bernardo Rangel Tura, M.D,MPH,Ph.D National Institute of Cardiology Brazil ______________________________________________ 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.