left_join question

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1 
# Combine the star_destroyer and millennium_falcon tables
millennium_falcon %>%
  left_join(star_destroyer, by=c("part_num","color_id"), suffix=c("_falcon","_star_destroyer"))

My question is by=c("part_num","color_id"). How to interpret 2 bys here? Does this mean we connect observations from 2 tables that share both the same part_num and the same color_id?

2

Yes, the data sets being joined must match in both of the columns.

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