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nina
2003 Nov 11
1
nlme-problem
...alue))/2) : the leading minor of order 2 is not
positive definite
Could you give me some ideas what might be wrong and how to deal with it?
I know that the data and the syntax should be ok as I have tested it
already with exponential model. The problem seems to be in the model-form.
Many thanks,
Niina Kotamaki
University of Jyvaskyla