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2012 Apr 18
1
Add covariate in nlme?
Hi R-experts,
I have a problem using nlme. I use the following code to group my data:
Parameterg <- groupedData( result ~ time | Batch,
data = Batchdata,
labels = list( x = "Time", y = "analysis")
)
and then uses the nlme function to fit a nonlinear mixed model that includes
Process as a fixed covariate:
nlme.model001epr <- nlme(result ~ A0 * exp(- ( exp(A1...