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View anti-join vs setdiff
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# The main idea comes from this post: | |
# http://zevross.com/blog/2014/08/05/using-the-r-function-anti_join-to-find-unmatched-records/ | |
# Setting up | |
df.1 <- data.frame( | |
state = rep(1:3, each=2), | |
country = rep(c("A","B"),3), | |
vals = rnorm(6) | |
) |
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