[R] Compare three or more values?

[Beale, Holly (NIH/NHGRI) [F]]

Erik: 

(head smack) Of course! Thank you.

On 3/23/11 2:47 PM, "Erik Iverson" <eriki at ccbr.umn.edu> wrote:

>Holly,
>
>try
>
> > length(unique(x)) == 1
>
>where x is your vector of interest. But think about
>how you want NA values to be treated, and also think about
>R FAQ 7.31 if dealing with floating point numbers.
>
>--Erik
>
>
>Beale, Holly (NIH/NHGRI) [F] wrote:
>> Is there a less cryptic way to compare three or more values?
>> 
>> allTheSame<-c("red","red","red","red")
>> notAllTheSame<-c(132,132,132,999)
>> 
>> all.identical <- function(vectorToTest){
>>     cIdentical=sum(vectorToTest %in% vectorToTest[1])
>>     return(cIdentical==length(vectorToTest))
>>     }
>> 
>> all.identical(allTheSame)
>> all.identical(notAllTheSame)
>> 
>> Thanks in advance,
>> Holly
>> 
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