Thank you all for your help. I see that my error was unconsciously expecting them to use absfconv=1e-6 (or whatever) when computing the coefficients. This came up with the same answer as fconv=1e-8 that you gave which is: intercept = -1.7310180741539600 x = 0.3790914824860400 _LNLIKE_ = -5.2233468313521700 Then I would have expected them to round off to whatever length they wanted - like -1.7310 and 0.3791 But it's all an approximation, so we'll live with it.
... View more