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 <williamwdunlap at 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.wadud at 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 at 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]]
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.wadud at 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 <williamwdunlap at
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.wadud at
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 at 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]]
Hi Bill, Thanks for rectifying the issue. It seems to be a cube root of a negative real issue. After updating the function it's working fine and showing the correct results. I highly appreciate your help. Best wishes, Sania On Fri, 16 Oct 2020 at 00:36, Bill Dunlap <williamwdunlap at gmail.com> wrote:> 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.wadud at 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 <williamwdunlap at 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.wadud at 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 at 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]]