Also if you simultaneously change the 2000 to say 1999? -p
On 10 Mar 2016, at 09:22 , John Hillier <j.hill...@lboro.ac.uk> wrote: > Thank you Peter, > > I believe this might be the way the error message is hard coded (i.e. it's > always y to describe the input). Anyway, I changed the first line to >> pdataH <- data.frame(y = H_to_fit$Height) > This makes the input 'y' instead of 'H_to_fit.Height', but makes no > difference to the outcome/error message. > > John > > ------------------------- > Dr John Hillier > Senior Lecturer - Physical Geography > Loughborough University > 01509 223727 > > ________________________________________ > From: peter dalgaard <pda...@gmail.com> > Sent: 09 March 2016 19:58 > To: John Hillier > Cc: r-help@r-project.org > Subject: Re: [R] truncpareto() - doesn't like my data and odd error message > >> On 09 Mar 2016, at 18:52 , John Hillier <j.hill...@lboro.ac.uk> wrote: >> >> Dear All, >> >> >> I am attempting to describe a distribution of height data. It appears >> roughly linear on a log-log plot, so Pareto seems sensible. However, the >> data are only reliable in a limited range (e.g. 2000 to 4800 m). So, I would >> like to fit a Pareto distribution to the reliable (i.e. truncated) section >> of the data. >> >> >> I found truncpareto(), and implemented one of its example uses successfully. >> Specifically, the third one at >> http://www.inside-r.org/packages/cran/vgam/docs/paretoff (also see p.s.). >> >> >> When I try to run my data, I get the output below. Inputs shown with >> chevrons. >> >> >>> pdataH <- data.frame(H_to_fit$Height) >>> summary(pdataH) >> H_to_fit.Height >> Min. :2000 >> 1st Qu.:2281 >> >> Median :2666 >> Mean :2825 >> 3rd Qu.:3212 >> Max. :4794 >>> fit3 <- vglm(y ~ 1, truncpareto(2000, 4794), data = pdataH, trace = TRUE) >> Error in eval(expr, envir, enclos) : >> the value of argument 'lower' is too high (requires '0 < lower < min(y)') >> >> >> This is odd as the usage format is - truncpareto(lower, upper), and varying >> 2000 to 1900 and 2100 makes no difference. Neither do smaller or larger >> variations. From the summary I think that my lowest input is 2000, which I >> am taking as min(y). I have also played with the upper limit. pdataH has >> 2117 observations in it. >> >> >> Is this a data format thing? i.e. of pdataH (a tried a few things, but to no >> avail) >> > > Umm, it doesn't seem to have a column called "y"? > > -- > Peter Dalgaard, Professor, > Center for Statistics, Copenhagen Business School > Solbjerg Plads 3, 2000 Frederiksberg, Denmark > Phone: (+45)38153501 > Office: A 4.23 > Email: pd....@cbs.dk Priv: pda...@gmail.com > > > > > > > > > -- Peter Dalgaard, Professor, Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Office: A 4.23 Email: pd....@cbs.dk Priv: pda...@gmail.com ______________________________________________ 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.
