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Last active Feb 5, 2019
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# add ID and models columns to mtcars
mtcars$ID <- 1:32
mtcars$models <- rownames(mtcars)
# create another ID dataframe
customers <- data.frame(ID = 1:10,
cust_name = LETTERS[1:10],
year = 2010:2019)
# see first six rows of customers
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