On Tue, 11-Aug-2009 at 06:48PM -0700, Jill Hollenbach wrote:
|>
|> Hi,
|> I am trying to edit a data frame such that the string in the first line is
|> appended onto the beginning of each element in the subsequent rows. The data
|> looks like this:
|>
|> > df
|> V1 V2 V3 V4
|> 1 DPA1* DPA1* DPB1* DPB1*
|> 2 0103 0104 0401 0601
|> 3 0103 0103 0301 0402
|> .
|> .
|> and what I want is this:
|>
|> >dfnew
|> V1 V2 V3 V4
|> 1 DPA1* DPA1* DPB1* DPB1*
|> 2 DPA1*0103 DPA1*0104 DPB1*0401 DPB1*0601
|> 3 DPA1*0103 DPA1*0103 DPB1*0301 DPB1*0402
|>
|> any help is much appreciated, I am new to this and struggling.
as.data.frame(lapply(df, function(x) paste(x[1], x[-1], sep = "")))
There's a few ideas in there that will get you started. We could add
a bit more to get the first row you want in one line, but you'll be
able to work that out.
That will end up as a dataframe of factors. You might need to do
something else with it after that stage.
HTH
--
~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.
___ Patrick Connolly
{~._.~} Great minds discuss ideas
_( Y )_ Average minds discuss events
(:_~*~_:) Small minds discuss people
(_)-(_) ..... Eleanor Roosevelt
~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.
______________________________________________
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.
