[R] How to replace the values in a column

Rui Barradas rui1174 at sapo.pt
Wed Feb 29 17:12:37 CET 2012


Try the following.
(In Andrija's code I've changed 'df' to 'DF', 'df' is a R function name)

DF <- read.table( ... etc ...

tc <- textConnection("
Column1(Gen)        Column2(Name)
A_1                               Wynda
A_2                                 A_2
B_1                                 B_1
B_3                             Wynda
OP1_1                       Wynda
OP1_5                        OP1_5 
TransTable <- read.table(tc, header=TRUE, stringsAsFactors=FALSE)

nrTrans <- nrow(TransTable)

for(iTrans in 1:nrTrans){
	i <- DF$Gen == TransTable[iTrans, 1]
	DF$Gen[i] <- TransTable[iTrans, 2]
# See first 6 lines of result

That's it.

Hope this helps,

Rui Barradas

View this message in context: http://r.789695.n4.nabble.com/How-to-replace-the-values-in-a-column-tp4430448p4431983.html
Sent from the R help mailing list archive at Nabble.com.

More information about the R-help mailing list