[R] Finding Source of Error Message of 'Non-Unique Index Entries'

[David Winsemius]

On Jan 3, 2012, at 12:48 PM, Rich Shepard wrote:

> On Tue, 3 Jan 2012, Rich Shepard wrote:
>
>> I _think_ the problem comes from a duplicated factor column in the  
>> data
>> frame. Now I need to figure out how subset() generated that  
>> additional
>> column.
>
>  Nope. That's not it.
>
>  Running 'duplicated(burns.tds, incomparables = FALSE)' produces a  
> listing
> of FALSE and TRUE keyed by position:
>
>> duplicated(burns.tds, incomparables = FALSE)
> [1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE  
> FALSE FALSE
> [13] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE  
> FALSE FALSE
> [25] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE  
> FALSE FALSE
> [37] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE  
> FALSE FALSE
> [49] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE  
> FALSE FALSE
> [61] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE  
> FALSE FALSE
> [73] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE  
> FALSE FALSE
> [85] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE  
> FALSE FALSE
> [97] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE  
> FALSE FALSE
> [109] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE TRUE  
> FALSE FALSE
> ...
>

That's rather unconvincing. What does this show:

burns.tds[ !duplicated(burns.tds) ]


> but, summary(burns.tds), str(burns.tds), or burns.tds produces a  
> comparable
> list so I can find the TRUE by position and determine what's  
> duplicated.
> What do I do to use this output to find the duplicates that won't let
> read.zoo() complete?
>
> Rich
>
> ______________________________________________
> R-help at r-project.org mailing list
> 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.

David Winsemius, MD
West Hartford, CT