add another step: (need to learn about regular expressions)
> a
[1] "X35.84375_.100.71875"
> a.new <- sub("^.", '', a)
> a.new
[1] "35.84375_.100.71875"
> sub("_.", "_-", 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 4:39 PM, lily li <chocol...@gmail.com> wrote:
> 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 <jholt...@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 <chocol...@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@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.html
>>> and provide commented, minimal, self-contained, reproducible code.
>>>
>>
>>
>
[[alternative HTML version deleted]]
______________________________________________
R-help@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.html
and provide commented, minimal, self-contained, reproducible code.
