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...mod2 <- nls(mymod2, start = list(theta1 = trysol2$coefficients[[1]], theta2 = trysol2$coefficients[[2]], theta3 = trysol2$coefficients[[3]]), data = mod14data2_random) And I got this error: Error in nlsModel(formula, mf, start, wts, scaleOffset = scOff, nDcentral = nDcntr) : singular gradient matrix at initial parameter estimates Any idea on how to proceed in this situation? What could I do? Kind regards, Paul [[alternative HTML version deleted]]

...t(theta1 = > trysol2$coefficients[[1]], > theta2 = trysol2$coefficients[[2]], > theta3 = trysol2$coefficients[[3]]), data = > mod14data2_random) > > And I got this error: > Error in nlsModel(formula, mf, start, wts, scaleOffset = scOff, nDcentral = > nDcntr) : > singular gradient matrix at initial parameter estimates > > Any idea on how to proceed in this situation? What could I do? > > Kind regards, > Paul > > [[alternative HTML version deleted]] > > ______________________________________________...

...coefficients[[1]], >> theta2 = trysol2$coefficients[[2]], >> theta3 = trysol2$coefficients[[3]]), data = >> mod14data2_random) >> >> And I got this error: >> Error in nlsModel(formula, mf, start, wts, scaleOffset = scOff, nDcentral >> = >> nDcntr) : >> singular gradient matrix at initial parameter estimates >> >> Any idea on how to proceed in this situation? What could I do? >> >> Kind regards, >> Paul >> >> [[alternative HTML version deleted]] >> &gt...

...theta2 = trysol2$coefficients[[2]], >>> theta3 = trysol2$coefficients[[3]]), data = >>> mod14data2_random) >>> >>> And I got this error: >>> Error in nlsModel(formula, mf, start, wts, scaleOffset = scOff, >>> nDcentral = >>> nDcntr) : >>> singular gradient matrix at initial parameter estimates >>> >>> Any idea on how to proceed in this situation? What could I do? >>> >>> Kind regards, >>> Paul >>> >>> [[alternative HTML ver...

...trysol2$coefficients[[2]], >>>> theta3 = trysol2$coefficients[[3]]), data = >>>> mod14data2_random) >>>> >>>> And I got this error: >>>> Error in nlsModel(formula, mf, start, wts, scaleOffset = scOff, >>>> nDcentral = >>>> nDcntr) : >>>> singular gradient matrix at initial parameter estimates >>>> >>>> Any idea on how to proceed in this situation? What could I do? >>>> >>>> Kind regards, >>>> Paul >>>> >>&gt...

...]], >>>>> theta3 = trysol2$coefficients[[3]]), data = >>>>> mod14data2_random) >>>>> >>>>> And I got this error: >>>>> Error in nlsModel(formula, mf, start, wts, scaleOffset = scOff, >>>>> nDcentral = >>>>> nDcntr) : >>>>> singular gradient matrix at initial parameter estimates >>>>> >>>>> Any idea on how to proceed in this situation? What could I do? >>>>> >>>>> Kind regards, >>>>> Paul...

...ION_InstallFiles Failed to copy L"Z:\\home\\ralph\\Desktop\\CAP\\Files\\Game\\Sound\\Click_AfterThreeBells_02_SFX.HIS" to L"C:\\Program Files\\Nancy Drew\\The Captive Curse\\Sound\\Click_AfterThreeBells_02_SFX.HIS" (2) err:msi:ACTION_InstallFiles Failed to copy L"D:\\Files\\NDCentral\\AxInterop.SHDocVw.dll" to L"C:\\Program Files\\Nancy Drew\\Nancy Drew Central\\AxInterop.SHDocVw.dll" (2) You can get installation to progress further by fixing the issues in a writeable copy. Clearly the installer is processing the names in some fashion or is somewhat tolerant of...

The cautions people have given about starting values are worth heeding. That nlxb() does well in many cases is useful, but not foolproof. And John Fox has shown that the problem can be tackled very simply too. Best, JN On 2023-08-19 18:42, Paul Bernal wrote: > Thank you so much Dr. Nash, I truly appreciate your kind and valuable contribution. > > Cheers, > Paul > > El El