[R] Find the first values in vector

[Grzes]

Thank You All Very Much  :jumping:

Dimitris Rizopoulos-4 wrote:
> 
> yet another solution is:
> 
> vec <- c(TRUE, TRUE, TRUE, TRUE, FALSE, FALSE, FALSE, FALSE, TRUE, TRUE, 
> FALSE)
> 
> seq_len(rle(vec)$lengths[1])
> 
> 
> I hope it helps.
> 
> Best,
> Dimitris
> 
> 
> Grzes wrote:
>> Hi !
>> I have a vector:
>> vec= TRUE  TRUE  TRUE  TRUE FALSE FALSE FALSE FALSE TRUE  TRUE  FALSE
>> and I'm looking for a method which let me get only the first values equal
>> TRUE from this vector. It means that I want to get a vector:
>> vec_out =  TRUE  TRUE  TRUE  TRUE 
>> 
>> or posictions values = TRUE: vec_out = 1,2,3,4
> 
> -- 
> 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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> 
> 

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