BOD
Attachment  Size 

dataset93773.csv  53 bytes 
Documentation 

Biochemical Oxygen DemandThe UsageBOD FormatThis data frame contains the following columns:
SourceBates, D.M. and Watts, D.G. (1988), Nonlinear Regression Analysis and Its Applications, Wiley, Appendix A1.4. Originally from Marske (1967), Biochemical Oxygen Demand Data Interpretation Using Sum of Squares Surface M.Sc. Thesis, University of Wisconsin – Madison. Examplesrequire(stats) # simplest form of fitting a firstorder model to these data fm1 < nls(demand ~ A*(1exp(exp(lrc)*Time)), data = BOD, start = c(A = 20, lrc = log(.35))) coef(fm1) fm1 # using the plinear algorithm fm2 < nls(demand ~ (1exp(exp(lrc)*Time)), data = BOD, start = c(lrc = log(.35)), algorithm = "plinear", trace = TRUE) # using a selfstarting model fm3 < nls(demand ~ SSasympOrig(Time, A, lrc), data = BOD) summary(fm3) 
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