On Sat, Aug 11, 2012 at 8:51 AM, Sachinthaka Abeywardana
<sachin.abeyward...@gmail.com> wrote:
> I should have mentioned that I do not know the number index of the columns,
> but regardless, thanks for the responses
Right, so use my first method. This does not depend on the position of
the columns.
Best,
Ista
>
>
> On Sat, Aug 11, 2012 at 10:46 PM, Ista Zahn <istaz...@gmail.com> wrote:
>>
>> Hi Sachin,
>>
>> There are at least two ways. The safer way is to use a regular
>> expression to find the matching columns, like this:
>>
>> a <- initial_data[grep("^OFB[0-9]+", names(initial_data))]
>>
>> Alternatively, if you know that the columns you want are the first 8
>> you can select them by position, like this:
>>
>> a <- initial_data[1:8]
>>
>> Best,
>> Ista
>>
>> On Sat, Aug 11, 2012 at 7:59 AM, Sachinthaka Abeywardana
>> <sachin.abeyward...@gmail.com> wrote:
>> > Hi all,
>> >
>> > I have a data frame that has the columns OFB1, OFB2, OFB3,... OFB10.
>> >
>> > How do I select the first 8 columns efficiently without typing each and
>> > every one of them. i.e. I want something like:
>> >
>> > a<-data.frame(initial_data$OFB1-10) #i know this is wrong, what would be
>> > the correct syntax?
>> >
>> > Thanks,
>> > Sachin
>> >
>> > [[alternative HTML version deleted]]
>> >
>> > ______________________________________________
>> > R-help@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.
>
>
______________________________________________
R-help@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.
