Hi R,
y1 <- zoo(matrix(1:10, ncol = 2), 1:5) colnames(y1)=c("a","b") y2 <- zoo(matrix(rnorm(10), ncol = 2), 6:10) colnames(y2)=c("b","a") > y1 a b 1 1 6 2 2 7 3 3 8 4 4 9 5 5 10 > y2 b a 6 0.9070204 0.3527630 7 1.2405943 0.8275001 8 -0.1690653 -0.1724976 9 -0.6905223 -1.1127670 10 0.3776210 0.4208908 Now, I have to append these two zoo objects, y1 and y2. So, I do as follows: > rbind(y2,y1) b a 1 1.0000000 6.0000000 2 2.0000000 7.0000000 3 3.0000000 8.0000000 4 4.0000000 9.0000000 5 5.0000000 10.0000000 6 0.9070204 0.3527630 7 1.2405943 0.8275001 8 -0.1690653 -0.1724976 9 -0.6905223 -1.1127670 10 0.3776210 0.4208908 > The doubts I get are as follows: 1. The above rbind function for the zoo objects doesn't take care of the column names while merging. Example: Column 'a' of y1 is appended with column 'b' of y2. Why is this so? How do I get rid of this? 2. In the rbind function, I have given y2 first and then y1. But in the appended data, I see the data corresponding to y1 first and then of y2. Is this because of ordering of the index elements of the zoo objects? Or, is there any other better function to append zoo objects? Thanks in advance, Shubha [[alternative HTML version deleted]] ______________________________________________ R-help@stat.math.ethz.ch 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.