[R] How can I access an element of a string?

[Henrik Singmann]

Dear Miao,

substr() ius waht you want.

substr("ABCD", 2,2)
[1] "B"

Cheers,
Henrik

jpm miao schrieb:
> Dear Daniel and Jorge,
>
>     Thank you very much and it does help.
>
>     If I have a string "ABCD", how can I access the second element of the
> string "B"? Thanks,
>
> Miao
>
> 2012/7/27 Daniel Nordlund <djnordlund at frontier.com>
>
>>> -----Original Message-----
>>> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
>>> On Behalf Of jpm miao
>>> Sent: Thursday, July 26, 2012 9:12 PM
>>> To: r-help
>>> Subject: [R] How can I access the title of a table read via read.csv?
>>>
>>> Hi,
>>>
>>>     I have a table which I can read via read.csv:
>>>
>>> fx1<-read.csv(file="A_FX_M.csv", header=TRUE)
>>>
>>>      TIME   REER    NTD    JPY      GBP    HKD
>>> 1 198001 124.26 36.030 237.96 2.263980 4.8366
>>> 2 198002 126.59 36.030 244.05 2.290426 4.8765
>>> 3 198003 128.33 36.026 248.62 2.206045 4.9960
>>> 4 198004 127.85 36.063 251.67 2.215330 4.9760
>>> 5 198005 124.40 36.050 228.35 2.302026 4.8891
>>> 6 198006 124.64 36.028 218.05 2.336995 4.9017
>>> 7 198007 125.17 36.007 220.95 2.371917 4.9046
>>> 8 198008 128.87 35.966 224.45 2.369107 4.9360
>>>
>>> .......................
>>>
>>>
>>>    How  can I access the title of the table? For example, I would like
>>> to access the character string "REER"; how can I do it?
>>>
>>>
>>>    Thanks,
>>>
>>>
>>> Miao
>>>
>>
>> Look at ?colnames.
>>
>> colnames(fx1)[2]
>>
>>
>>
>> Hope this is helpful,
>>
>> Dan
>>
>> Daniel Nordlund
>> Bothell, WA USA
>>
>> ______________________________________________
>> R-help at 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.
>>
>
> 	[[alternative HTML version deleted]]
>

-- 
Dipl. Psych. Henrik Singmann
PhD Student
Albert-Ludwigs-Universität Freiburg, Germany
http://www.psychologie.uni-freiburg.de/Members/singmann