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667801
2012 May 02
2
Problem with 'nls' fitting logistic model (5PL)
Dear R-Helpers,
I'm working with immunoassay data and 5PL logistic model. I wanted to
experiment with different forms of weighting and parameter selection,
which is not possible in instrument software, so I turned to R.
I am using R 2.14.2 under Win7 64bit, and the 'nls' library to fit the
model - I started with the same model and weighting type (1/y) as in the
instrument to see