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pr_mean
2005 Mar 10
2
Logistic regression goodness of fit tests
...la and recreates it using lrm as above. Now the problem is that for some models I run into an error to which I can find no reference whatsoever on the mailing list or on the web. It is as follows:
test.lrm <- lrm(cclo ~ elev + aspect + cti_var + planar + feat_div + loamy + sands + sandy + wet + slr_mean, data=datamatrix, x = T, y = T)
singular information matrix in lrm.fit (rank= 10 ). Offending variable(s):
slr_mean
Error in j:(j + params[i] - 1) : NA/NaN argument
Now if I add the singularity criterion and make the value smaller than the default of 1E-7 to 1E-9 or 1E-12 which is the default i...