Look closer.... -pd
> On 10 Mar 2016, at 18:41 , John Hillier <j.hill...@lboro.ac.uk> wrote: > > Thank you Peter, > > Yes, it seems to do the same even if I simultaneously make that change. > Output below. > >> pdataH <- data.frame(y = H_to_fit$Height) >> summary(pdataH) > y > Min. :2000 > 1st Qu.:2281 > Median :2666 > Mean :2825 > 3rd Qu.:3212 > Max. :4794 >> fit3 <- vglm(y ~ 1, truncpareto(1999, 4794), data = pdataH, trace = TRUE) > Error in eval(expr, envir, enclos) : > the value of argument 'upper' is too low (requires 'max(y) < upper') > > ------------------------- > Dr John Hillier > Senior Lecturer - Physical Geography > Loughborough University > 01509 223727 > > ________________________________________ > From: peter dalgaard <pda...@gmail.com> > Sent: 10 March 2016 09:36 > To: John Hillier > Cc: r-help@r-project.org > Subject: Re: [R] truncpareto() - doesn't like my data and odd error message > > Also if you simultaneously change the 2000 to say 1999? > > -p > > On 10 Mar 2016, at 09:22 , John Hillier <j.hill...@lboro.ac.uk> wrote: > >> Thank you Peter, >> >> I believe this might be the way the error message is hard coded (i.e. it's >> always y to describe the input). Anyway, I changed the first line to >>> pdataH <- data.frame(y = H_to_fit$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 > -- 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.
