Hi list, I tried to use nls to do some nonlinear least square fitting on my data with 340 observations and 10 variables, but as I called nls() function, I got this error message: Error in qr.qty(QR, resid) : 'qr' and 'y' must have the same number of rows Then I traced back a little bit into nls() function, the error seemed to happen when calling nlsiter() internal function, but I did not find any clue calling qr.qty() function in nls.c. I searched around mailing list, there were some posts about this message but none of them were clearly solved. I wonder if anybody solved this problem? (Bate's example worked, though)
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