Toni Pitcher schrieb:
This works to some extent, all As have been changes to Cs, but the Bs
have also been changed, in this case to "2", instead of remaining as
their original values. How do I get the Bs to stay the same?
You should consult some introductory tutorial dealing with Rs way of
treating vectors and especially indexing ("An untroduction to R" would
be a good start). What kind of R object is data$Group ?
(class(data$Group) ) ...If it is a character vector I would use logical
indexing:
data$Group[data$Group=='A']=='C'
Second problems is similar;
I need to change some of the Subject IDs. The required format is 3
numbers followed by 3 letters (999LLL). Some of the IDs have format
999LLL-LL, Thus I need to delete the -LL from the IDs.
How do I generically specify "find 999LLL-LL and replace with 999LLL"?
What do you mean by IDs? Rownames?
Generally charcter replacement works with:
?sub
HTH
Jannis
Many thanks in advance
Toni
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