[R] regexpr

[runner]

using lapply is so great. That help me a lot.
thanks.


Stephen Tucker wrote:
> 
> I think you are looking for paste().
> 
> And you can replace your for loop with lapply(), which will apply regexpr
> to
> every element of 'mylist' (as the first argument, which is 'pattern').
> 'text'
> can be a vector also:
> 
> mylist <- c("MN","NY","FL")
> lapply(paste(mylist,"$",sep=""),regexpr,text="Those from MN:")
> 
> 
> 
> --- runner <sunnyside500 at gmail.com> wrote:
> 
>> 
>> Hi, 
>> 
>> I 'd like to match each member of a list to a target string, e.g.
>> ------------------------------
>> mylist=c("MN","NY","FL")
>> g=regexpr(mylist[1], "Those from MN:")
>> if (g>0)
>> {
>> "On list"
>> }
>> ------------------------------
>> My question is:
>> 
>> How to add an end-of-string symbol '$' to the to-match string? so that
>> 'M'
>> won't match.
>> 
>> Of course, "MN$" will work, but i want to use it in a loop; "mylist[i]"
>> is
>> what i need. I tried "mylist[1]$", but didn't work. So why it doesn't
>> extrapolate? How to do it?
>> 
>> Thanks a lot!
>> -- 
>> View this message in context:
>> http://www.nabble.com/regexpr-tf4000743.html#a11363041
>> Sent from the R help mailing list archive at Nabble.com.
>> 
>> ______________________________________________
>> R-help at stat.math.ethz.ch 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.
>> 
> 
> 
> 
>  
> ____________________________________________________________________________________
> Bored stiff? Loosen up...
> 
> ______________________________________________
> R-help at stat.math.ethz.ch 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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