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gargan
2002 Sep 27
2
How to apply SSfpl with binary data
...r quantitative data(Chick).
V1: dose
V2: log-transformed dose
V3: response (rate)
V1 V2 V3
1 0.775 -0.2548922 0.1666667
2 5.000 1.6094379 0.8148148
3 10.000 2.3025851 0.5000000
4 20.000 2.9957323 0.6428571
I also attach the error message in R 1.5.1 in following.
> targan
V1 V2 V3
1 0.775 -0.2548922 0.1666667
2 5.000 1.6094379 0.8148148
3 10.000 2.3025851 0.5000000
4 20.000 2.9957323 0.6428571
> targan.1 <- nls(targan$V3 ~ SSlogis(targan$V2, Asym, xmid, scal), data = targan)
Error in solve.qr(a, b, tol) : singular matrix `a' in so...