[R] coefficient of determination on a nls regression

[Antonio Olinto]

Hello R-users,

How can I caculate the coefficient of determination (r-squared, r2) from a
nls regression model?

r2 = regression SS / total SS

The regression SS is given by deviance(model), isn't it? And what about
total SSQ?

Thanks,

Antonio Olinto
São Paulo Fisheries Institute
Brasil
www.institutopesca.sp.gov.br



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