Dear R experts, I have again a problem. Let I have a data frame like below:
x y ---------- A A A B B B A B where x and y are the column names. I want to create a new column z where it is elements will be like that, if at each row has there at least one 'B', then z will have value of B, if not then Z will have missing value(NA) for the corresponding row. So my result data frame should be like below: x y Z ------------------ A A NA A B B B B B A B B How can I do this with if else statements in R. Thanks a lot. -- View this message in context: http://r.789695.n4.nabble.com/if-else-statements-in-data-frame-tp3454646p3454646.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
