[R] finding the next highest number in an array

[David Winsemius]

On Jul 28, 2010, at 7:28 AM, Dimitris Rizopoulos wrote:

> a couple of the many possible ways are:
>
> x <- c(23,36,45,62,79,103,109)
> thr <- 67
>
> x[x > thr][1]
> head(x[x > thr], 1)

Since he wanted the subscript rather than the number wouldn't it be:

which(x > 67)[1]
head( which(x > 67), 1)
--  
David.
>
>
> I hope it helps.
>
> Best,
> Dimitris
>
>
> On 7/28/2010 12:12 PM, Raghu wrote:
>> Hi
>>
>> I have a sorted array ( in ascending order) and I want to find the  
>> subscript
>> of a number in the array which is the the next highest number to a  
>> given
>> number. For example,if I have 67 as a given number and if I have a  
>> vector
>> x=c(23,36,45,62,79,103,109), then how do I get the subscript 5 from  
>> x (to
>> get 79 which is the next highest to 67) without using a for loop?
>>
>> Thx
>>
>
> -- 
> Dimitris Rizopoulos
> Assistant Professor
> Department of Biostatistics
> Erasmus University Medical Center
>
> Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands
> Tel: +31/(0)10/7043478
> Fax: +31/(0)10/7043014
>
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David Winsemius, MD
West Hartford, CT