Top N and Last N records in R Data Frame

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How to fetch top N and last N records in R Data Frame?
Jul 1, 2019 in Data Analytics by nidhi
3,785 views

2 answers to this question.

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Use head() to fetch first N rows and tail() to fetch last N rows.

head(airquaity, N) and tail(airquality, N)

answered Jul 4, 2019 by Cherukuri
• 33,010 points
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Hi,

top_n( ) and top_frac( ) also is used to fetch the top n records by nunber or fraction.

top_n(x, n, wt)

top_frac(x, n, wt)

Ex:

df %>% top_n(n() * .5)
df %>% top_frac(.5)
answered Sep 3, 2019 by anonymous
• 33,010 points

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