Good Morning,
I am trying to create a new column of character strings based on the first
two letters in a string in another column. I believe that I need to use some
combination of ifelse and grep but I am not totally sure how to combine
them. I am not totally sure why the command below isn't working. Obviously
it isn't finding anything that matches my criteria but I am not sure why.
Any ideas on how I might be able to modify this to get to work? Below is
also a data example of what I would like to achieve with this command.
> section <- ifelse(Sample==grep("^BU", Sample),"up",
ifelse(Sample==grep("^BM", Sample), "mid","down"))
> section
[1] "down" "down" "down" "down" "down" "down" "down" "down" "down" "down"
[11] "down" "down"
Thanks in advance.
Sam
Sample Transmission section BU1 0.39353 up BU2 0.38778 up BU3 0.42645 up
BM1 0.37510 mid BM2 0.5103 mid BM3 0.67224 mid BD1 0.37482 down BD2
0.54716 down BD3 0.50866 down BU1 0.34869 up BU2 0.32831 up BU3 0.59877
up BM1 0.52518 mid BM2 0.94387 mid BM3 0.94387 mid BD1 0.46872 down BD2
0.63115 down BD3 0.45239 down
n" "down" "down" "down" "down" "down" "down"
--
*****************************************************
Sam Albers
Geography Program
University of Northern British Columbia
3333 University Way
Prince George, British Columbia
Canada, V2N 4Z9
phone: 250 960-6777
*****************************************************
[[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.
