I have a data.frame
df = data.frame(
a = sample(letters, 100, replace=T),
b = runif(100),
d = runif(100)
)
And I want to find the first element of each row grouped by a and ordered by b. How do I achieve that?
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xiaodai
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1`df %>% group_by(a) %>% slice(which.min(b)) ` ? – Ronak Shah Sep 13 '19 at 07:01
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plenty of answers here: https://stackoverflow.com/q/13279582/4550695 sort by `b` first and then apply those – Mikko Marttila Sep 13 '19 at 07:14