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Last active Aug 15, 2019
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R4Excel - vlookup in R
## read a lookup table into R
lookup_state <- read.csv("lookup_table.csv")
## filter only US students
df_us <- filter(df, nationality == "US")
## we can use left_join to do vlookup in R
df_us %>%
left_join(lookup_state, by = c("id" = "us_students")) %>%
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