Hello all,
I have a rather easy question. I want to add a column to the database which
will change the values of vector a based on the values to vector b. Any
ideas how?
For example:
Dat <- data.frame(a= c('A','A','C','B','D','D','B'),
b= c('N','N','Y','N','Y','N','N') )
I want to add a column c which will change 'C' to 'D' if column b is 'Y'.
> Dat
a b c
1 A N A
2 A N A
3 C Y D
4 B N B
5 C Y D
6 C N C
7 B N B
Any ideas?
Best,
ioanna
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