Dear R userers, I am running truncated regressions with the 'truncreg' package. My sample is large (6,000 observations), the data is left-truncated at 1 and the left tail of the data is heavily centered at 1. When I am running the regression I receive the following error message:
Error in optim(par = start[!fixed], fn = logLikFunc, control = control, : initial value in 'vmmin' is not finite >From a previous discussion ( http://r.789695.n4.nabble.com/betareg-help-td3350129.html) on a similar issue in the betareg function I assume that the error message stems from that the estimate of the starting value of the precision parameter is negative. However, I do not know how I can take care of this. Thus I would be very thankful for any help. Best regards, Philipp [[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.
