I have two data.frame columns and I want to replace part of the first
column with the second column :
temp<-data.frame(matrix(c("54E5","7","56D7","E3","56F12","14","56F3","10","57C5",NA,"59A1","3"),
ncol = 2))
if the 2nd column consists entirely of digits (1 or 2 digits)
I want to replace the last digit(s) in the first column with the digits
in the second column
so ...
54E5 7
56D7 E3
56F12 14
56F3 10
57C5 NA
59A1 3
generates a new column where some values are replaced :
54E7
56D7
56F14
56F10
57C5
59A3
I can pick out the digits in the 2nd column just fine.
But instead of 'xxx' below:
sub("^([0-9]{1,2})$","xxx\\1",temp$X2, perl = TRUE)
? How can I sub with what I want from the first column ?
Thanks for your help!
-chuck
(Actually, I also want to do a similar thing where E3 in the second row
replaces D7 so 56D7 becomes 56E3, pattern of first column is always
[0-9]{1,2}[A-F][0-9]{1,2} , but I'd be happy to just deal with the
original stated problem for now as it handles most of my cases)
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