Dear all,
I have used nlsLM in minpack.lm package for fitting a model using 22358 observations. Now I would like to compute PRESS residuals and have been trying it using qpcR package but it does not seem to work (I have fitted my data with a lm model and used qpcR PRESS and it worked fine). The message I get is: Error in as.data.frame.default(x[[i]], optional = TRUE) : cannot coerce class ""formula"" to a data.frame And also, with a different and smaller database, I got this message: .Error in PRESS.res[i] <- DATA[i, RESP.pos] - y.hat : replacement has length zero Can anyone please help me? Best regards, Francisco Goes [[alternative HTML version deleted]] ______________________________________________ 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.