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rogersii_n
2012 Apr 16
0
automatically scan multiple starting values
...parameter? In my model only Th3 is a parameter
with a good estimate (2.5). for v,w and x I would like to check a broad
range of values. Is it possible to do this in R?
Under my script for plots and nls regression and a copy of the values of
my data file.
plot(FR~N0,main="Rogers III")
RogersIII <-
nls(FR~N0*(1-exp(((v+w*FR)/(1+x*FR))*(Th3*FR-24))),start=list(v=0.002,w=0.00075,x=-0.1,Th3=2.5),control=list(maxiter=1000000,minFactor=0.0000000000000000000000000000000000001))
# 24 is tijd in uren
hatac <- predict(RogersIII)
lines(spline(N0,hatac))
summary(RogersIII)
N0 FR
5...