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2010 Feb 17
0
Help with sigmoidal quasi-poisson regression using glm and gnm functions
...on(link="identity"),
data=fit)
quasi-pois-sig <- gnm(y ~ x1 + Mult(1, Inv(Const(1) + Exp(Mult(1 +
offset(-x2), Inv(1))))), family = quasipoisson(link="identity"), data=fit)
I can perform the linear model but not the sigmoidal one and I get an error
message:
Error in if (all(diagInfo < 1e-20) || all(abs(score) < tolerance *
sqrt(tolerance + :
absent value when TRUE/FALSE is necessary
Besides: Lost warning messages
1: In log(ifelse(y == 0, 1, y/mu)) : There are NaNs
2: In sqrt(w) : There are NaNs
I have included all possible logical arguments in different ways but it
ha...