Estimated people,
I have two matrices:
ar1 <- array(data=c(1:16),dim=c(4,4))
ar2 <- array(data=c(1,2,3,3,5:16),dim=c(4,4))
They only differ in the fourth row. I would like to compare them in order to
know which columns are equal.
The following works, but I would like to have a better solution, and not to
use what someone called "prehistorical loops":
for(i in c(1:4)) { cat(as.character(i),": ",
as.character(setequal(ar1[i,],ar2[i,])), "\n") }
1 : TRUE
2 : TRUE
3 : TRUE
4 : FALSE
I cannot devise how to use the apply function for this.
Thanks a lot,
Federico
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