[R] Surprising message "Error in FUN(newX[, i], ...) : all arguments must have the same length"

[Eric Berger]

Hi Chris,
Maybe the na.rm=TRUE is affecting things. Try this
apply(datTAF[,75:78],2,function(x){ sum(!is.na(x)) })

HTH,
Eric


On Tue, Sep 26, 2017 at 9:53 AM, Chris Evans <chrishold at psyctc.org> wrote:

> I am hitting an odd message "Error in FUN(newX[, i], ...) : all arguments
> must have the same length".  I can't supply the data as it's a huge data
> frame but I think this has enough diagnostic information to show the
> issue.  I am sure I am missing something obvious.  I've put some extra
> comments in but otherwise this is cut and pasted from Rstudio.
>
> ### I wanted a table of the values in four columns:
> > apply(datTAF[,75:78],2,table,na.rm=TRUE)
> Error in FUN(newX[, i], ...) : all arguments must have the same length
>
> ### odd, surely as it's a data frame all x going into table() should be
> same length. Check:
> > apply(datTAF[,75:78],2,length)
>  RiskSuicide RiskSelfHarm  RiskHarmOth    RiskLegal
>         3009         3009         3009         3009
>
> ### I has reasons to think the tables should all be the same length.
> Check:
> > apply(datTAF[,75:78],2,function(x){length(table(x))})
>  RiskSuicide RiskSelfHarm  RiskHarmOth    RiskLegal
>            6            6            6            6
>
> ### Now I'm a bit baffled.  Try str:
> > apply(datTAF[,75:78],2,str)
>  Named chr [1:3009] "." "." "." "0" "0" "0" "0" "0" "0" "3" "0" "0" "0"
> "." "0" "0" "0" "0" "0" "." ...
>  - attr(*, "names")= chr [1:3009] "1" "2" "3" "4" ...
>  Named chr [1:3009] "0" "0" "0" "0" "0" "0" "0" "1" "0" "0" "0" "0" "0"
> "." "0" "0" "0" "0" "0" "." ...
>  - attr(*, "names")= chr [1:3009] "1" "2" "3" "4" ...
>  Named chr [1:3009] "0" "0" "0" "0" "0" "0" "0" "0" "0" "3" "0" "0" "0"
> "." "0" "0" "0" "0" "0" "." ...
>  - attr(*, "names")= chr [1:3009] "1" "2" "3" "4" ...
>  Named chr [1:3009] "0" "0" "0" "0" "0" "0" "0" "0" "0" "0" "0" "0" "1"
> "." "0" "0" "0" "0" "0" "." ...
>  - attr(*, "names")= chr [1:3009] "1" "2" "3" "4" ...
> NULL
>
> ### Not sure where that trailing "NULL" came from:
> > str(datTAF[,78])
>  chr [1:3009] "0" "0" "0" "0" "0" "0" "0" "0" "0" "0" "0" "0" "1" "." "0"
> "0" "0" "0" "0" "." "0" ...
>
> > Sys.info()
>        sysname        release        version       nodename
> machine          login
>      "Windows"     ">= 8 x64"   "build 9200"      "HPLP166"
>  "x86-64"  "Chris.Evans"
>           user effective_user
>  "Chris.Evans"  "Chris.Evans"
>
> Anyone see what I'm missing?  TIA,
>
> Chris
>
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