Hi Zac: Two suggestions. In the map statement, set silent = FALSE, hopefully that will give you more info, The second is to try what is suggested in the error message, " Try simplifying the model with the following argument: map = list(rho_o = factor(NA))". I don't know what rho_o does, but it might be a first step to figuring things out/
HTH, -Roy > On Jan 27, 2023, at 12:42 PM, ZAC WARHAM <zac.war...@students.mq.edu.au> > wrote: > > Hi all, I am receiving the error *Newton failed to find minimum* whilst > trying to fit a move persistence model in this package. I think the error > is related to the optimiser in the TMB package but it is beyond my > statistics/coding knowledge to track down the specific cause and solution. > I would appreciate it if anyone knew some resources to assist with fixing > this. I have put a MRE and sample data over on Stackoverflow if anyone > wants a closer look - > https://stackoverflow.com/questions/75253642/how-do-i-fix-newton-failed-to-find-minimum-in-r > > -- > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ********************** "The contents of this message do not reflect any position of the U.S. Government or NOAA." ********************** Roy Mendelssohn Supervisory Operations Research Analyst NOAA/NMFS Environmental Research Division Southwest Fisheries Science Center ***Note new street address*** 110 McAllister Way Santa Cruz, CA 95060 Phone: (831)-420-3666 Fax: (831) 420-3980 e-mail: roy.mendelss...@noaa.gov www: https://www.pfeg.noaa.gov/ "Old age and treachery will overcome youth and skill." "From those who have been given much, much will be expected" "the arc of the moral universe is long, but it bends toward justice" -MLK Jr. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
