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View Wk4_Submisison.ipynb
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View anti-join vs setdiff
# 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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