[R] about file name

[ruipbarradas at sapo.pt]

Hello,

Just use ?sub.

x <- "35.84375_.100.71875"
y <- sub("_\\.", "_-", x)

Hope this helps,

Rui Barradas
 

Citando lily li <chocold12 at gmail.com>:

> Thanks, but how to get the string like this:
> "35.84375_-100.71875" use the minus sign instead of dot.
>
> On Thu, Jul 28, 2016 at 2:38 PM, jim holtman <jholtman at gmail.com> wrote:
>> just strip off the first character:
>>
>> a
>> [1] "X35.84375_.100.71875"
>> a.new <- sub("^.", '', a)
>> a.new
>> [1] "35.84375_.100.71875"
>>
>> Jim Holtman
>> Data Munger Guru
>>
>> What is the problem that you are trying to solve?
>> Tell me what you want to do, not how you want to do it.
>>
>> On Thu, Jul 28, 2016 at 3:51 PM, lily li <chocold12 at gmail.com> wrote:
>>> Hi R users,
>>>
>>> I have a string for example 'X35.84375_.100.71875', and I have another
>>> dataframe df that I want to export with the transformed string name
>>> '35.84375_-100.71875' with no extension. How to do this in R? Thanks for
>>> your help.
>>>
>>> a = 'X35.84375_.100.71875'
>>> write.table(df, file='', row.names=F, col.names=F)
>>>
>>>         [[alternative HTML version deleted]]
>>>
>>> ______________________________________________
>>> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
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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.
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide  
> http://www.R-project.org/posting-guide.htmland provide commented,  
> minimal, self-contained, reproducible code.

 

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