[R] Find the first values in vector

Grzes gregorio99 at gmail.com
Mon Nov 9 21:47:24 CET 2009


Thank You All Very Much   :jumping:



baptiste auguie-5 wrote:
> 
> Hi,
> 
> One way would be,
> 
> vec[ cumsum(!vec)==0 ]
> 
> HTH,
> 
> baptiste
> 
> 2009/11/9 Grzes <gregorio99 at gmail.com>:
>>
>> 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
>> --
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>>
>> ______________________________________________
>> R-help at r-project.org mailing list
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>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
> 
> ______________________________________________
> 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.
> 
> 

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