Another bad case is > moments::anscombe.test(rep(c(1,1.1),length=35)) Error in if (pval > 1) pval <- 2 - pval : missing value where TRUE/FALSE needed
I haven't checked the formulas carefully, but I suspect the problem is from taking the cube root of a negative number in z <- (1 - 2/(9 * a) - ((1 - 2/a)/(1 + xx * sqrt(2/(a - 4))))^(1/3))/sqrt(2/(9 * a)) In R, the cube root (or any non-integral power) of a negative real number is NaN and ((1 - 2/a)/(1 + xx * sqrt(2/(a - 4)))) is c. -928 in this example. I think the intent was for the cube root to be a negative real, c. -9.76, in this case. If that is the intent, then a fix is to define a cube_root function for reals cube_root <- function (x) sign(x) * abs(x)^(1/3) and change the z<-... line to use cube_root() instead of ^(1/3). z <- (1 - 2/(9 * a) - cube_root(((1 - 2/a)/(1 + xx * sqrt(2/(a - 4))))))/sqrt(2/(9 * a)) -Bill On Thu, Oct 15, 2020 at 3:15 PM Sania Wadud <sania.wa...@gmail.com> wrote: > Hi Bill, > > Thanks for prompt reply and letting me know a way around it. > > I have more than 1200 observations and not all the values are the same. > However, my data points are quite similar, for example, > 0.079275, 0.078867, 0.070716 in millions and etc. I have run the data > without converting it to millions and I still get the same error > message. As I have kurtosis value, it should be fine for the time being. > However, in case if you have any other explanation behind the > error, I will highly appreciate it. > > Best wishes, > Sania > > On Thu, 15 Oct 2020 at 20:43, Bill Dunlap <williamwdun...@gmail.com> > wrote: > >> moments::anscombe.test(x) does give errors when x has too few values or >> if all the values in x are the same >> >> > moments::anscombe.test(c(1,2,6)) >> Error in if (pval > 1) pval <- 2 - pval : >> missing value where TRUE/FALSE needed >> > moments::anscombe.test(c(2,2,2,2,2,2,2,2)) >> Error in if (pval > 1) pval <- 2 - pval : >> missing value where TRUE/FALSE needed >> >> You can use tryCatch() to return some special value where these errors >> occur. E.g., use >> >> tryCatch(anscombe.test(x), error=function(e) list(p.value=NA)) >> >> instead of ascombe.test (this assumes you will only look at p.value later >> - add other entries as needed.). >> >> -Bill >> >> On Thu, Oct 15, 2020 at 12:09 PM Sania Wadud <sania.wa...@gmail.com> >> wrote: >> >>> Hi all, >>> >>> While running the anscombe.test in R, I'm getting an error of *Error in >>> if >>> (pval > 1) pval <- 2 - pval : missing value where TRUE/FALSE needed* for >>> a >>> few time series columns whereas for most of the series the function is >>> working fine. I have checked for those specific columns for missing >>> values. >>> However, there is no NA/NAN value in the dataset. >>> >>> I have also run kurtosis for those time series and I can get results. I >>> have noticed the same issue was reported in the following post for python >>> (scipy.stat) and the report mentions that there is a bug in moments >>> package >>> in R. I was wondering whether the issue has been resolved. >>> >>> https://github.com/scipy/scipy/issues/1950 >>> >>> Could anyone please help me with the error? >>> >>> I look forward to hearing from you. >>> >>> Regards, >>> Sania >>> >>> [[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. >>> >> [[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.