R help - May 2009 - vector fragment

Dear R users:



I have got a simple question that has been bothering me for a while.

Given a certain character vector, I would like to get in a separate vector a
fragment of text, in this case the 3rd and 4th letters of each element.



So, if:



v<- c(“stratosphere”, “mesosphere”, “troposphere”)



I want to obtain a different vector like this:



c(“ra”, “so”, “op”)



Thanks in advance for your help



Jonas

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Dear Jonas,
Try this:
> v<- c('stratosphere', 'mesosphere',
'troposphere')
> substr(v,3,4)
[1] "ra" "so" "op"

See ?substr for more information.

HTH,

Jorge


On Sat, May 16, 2009 at 9:52 AM, jonas garcia
<garcia.jonas80@googlemail.com
> wrote:
> Dear R users:
>
>
>
> I have got a simple question that has been bothering me for a while.
>
> Given a certain character vector, I would like to get in a separate vector
> a
> fragment of text, in this case the 3rd and 4th letters of each element.
>
>
>
> So, if:
>
>
>
> v<- c(“stratosphere”, “mesosphere”, “troposphere”)
>
>
>
> I want to obtain a different vector like this:
>
>
>
> c(“ra”, “so”, “op”)
>
>
>
> Thanks in advance for your help
>
>
>
> Jonas
>
>        [[alternative HTML version deleted]]
>
>
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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.
>
>
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