[R] Re: Problem with multiple factors in nlme

[Uli Flenker; Raum 704]

Sorry; two mistakes in my message:

<snip>

> When running the example as well as own code (biexponential model
> depending on two crossed factors) I receive the following error
> message: 
> 
> 	Error: comparison (2) only possible for vector types
> 

The true error message is 
	
> Error in fixed[[nm]][[3]] != "1" : comparison (2) is possible only for
> vector types

<snip>

> Code:
> 
> 	library(nlme)
> 	data(CO2)
> 	CO2.func <- deriv(~A*(1-exp(-exp(lB)*(conc-C))),
> 			c("A","lB","C"),
> 			function(conc,A,lB,C))

The correct function is

CO2.func <- deriv(~A*(1-exp(-exp(lB)*(conc-C))),
                      c("A","lB","C"),
                       function(conc,A,lB,C){})

<snip>

Sorry once more ...


         Uli Flenker
         Institute of Biochemistry
         German Sports University Cologne
         Carl-Diem-Weg 6
 
         50933 Cologne / Germany
 
         Phone 0049/0221/4982-493
 
 
 


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