[R] adding two colmns of a data frame

ozgrerg ozgrgun at gmail.com
Sat Apr 16 22:22:10 CEST 2011

It seems very simple but I could not find the way. I just want to add two
columns of a data frame. I am doing the below operation: 

data$C=transform(data, data$A+data$B)

However that return as a data frame. I will be glad if ypu help. Thanks a

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