search for: tp2069029p2069029

...s) : singular gradient matrix at initial parameter estimates". Can anyone please advise as to what I may be doing wrong? I have tried modifying the parameter start points with no success. Many thanks, -- View this message in context: http://r.789695.n4.nabble.com/NLS-Singular-Gradient-Error-tp2069029p2069029.html Sent from the R help mailing list archive at Nabble.com.