Hello,
I am just starting with R and I am having a (most probably) stupid problem by
creating a new variable in a data.frame based on a part of another character
variable.
I have a data frame like this one:
A B C
AWI-test1 1 i
AWI-test5 2 r
AWI-tes75 56 z
UFT-2 5 I
UFT56 f t
UFT356 9j t
etc. etc. 89 t
I now want to look in the variable A if the string AWI is present and then
create a variable D and putting "Arctic" inside. However, if the string UFT
occurs in the variable A, then the variable D shall be "Boreal" etc. etc.
The resulting data.frame file should look like
A B C D
AWI-test1 1 i Arctic
AWI-test5 2 r Arctic
AWI-tes75 56 z Arctic
UFT-2 5 I Boreal
UFT56 f t Boreal
UFT356 9j t Boreal
etc. etc. 89 t
I know how to do this when I want to look for the entire string of A means when
there is "AWI-test1" and then create the variable D with "Arctic" but not how
to look only for a substring in A?
Would be great if somebody might help.
Thanks
Philipp
***************************************************
[[alternative HTML version deleted]]
______________________________________________
[email protected] 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.
