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2009 Feb 10
2
plotting the result of a nonlinear regression
...ut I got an error message: for (i in 1:length(formList)) { resultList[[i]] <- nls(formList[[i]], data=subset(dati, Fiume=="Laveggio"), start=startList7[[i]], nls.control(maxiter=1000, warnOnly=TRUE), algorithm='port', na.action=na.omit,lower=lowerList7[[i]], upper=upperList7[[i]]) } plotfit(resultList[[1]] "Error in diff(as.numeric(y[ord])) : (list) object cannot be coerced to type 'double'" Could somebody tell me what this error means? how can I fix this problem? Any suggestion appreciated!! Thanks, Laura