Merging dataframes
I'd expect more like setdiff(A$key, B$key) and vice versa. Or, if you want the actual rows A[!(A$key %in% B$key),] or for the row numbers which(!(A$key %in% B$key)) -pd
On 1 May 2018, at 12:48 , Rui Barradas <ruipbarradas at sapo.pt> wrote: Hello, Is it something like this that you want? x <- data.frame(a = c(1:3, 5, 5:10), b = c(1:7, 7, 9:10)) y <- data.frame(a = 1:10, b = 1:10) which(x != y, arr.ind = TRUE) Hope this helps, Rui Barradas On 5/1/2018 11:35 AM, Chintanu wrote:
Hi, May I please ask how I do the following in R. Sorry - this may be trivial, but I am struggling here for this. For two dataframes (A and B), I wish to identify (based on a primary key-column present in both A & B) - 1. Which records (rows) of A did not match with B, and 2. Which records of B did not match with A ? I came across a setdt function while browsing, but when I tried it, it says - Could not find function "setdt". Overall, if there is any way of doing it (preferably in some simplified way), please advise. Many thanks in advance. regards, Tito [[alternative HTML version deleted]]
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