Thanks for helping me with R's ifelse.
This creates a fake dataset.
test = expand.grid(a = c(1, 2, 3, 4), b = c(1, 2, 3))
What I want to do is to something like this:
if a=3 then do;
if b=1 then news="3 and 1";
if b=2 then news="3 and 2";
end;
This below does half of the job. Could you advise?
test$news <- ifelse(test$a == 3,ifelse(test$b == 1, "3 and 1",""),"")
Please email me at k u e k a w a @gmail.com .
Thanks.