dplyr

4481 Questions
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Map top_n function to grouped data
user_89530630
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2
5
284
tidyr dplyr r
R cummax function with NA
user_56191710
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4
3
373
dplyr max r function
Rolling Sum for number of questions solved for past 7 days by every user
user_115939920
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3
3
612
dplyr r
Mutate a column in data.table with ifelse and group by
user_53192290
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3
2
1742
data.table dplyr grouping r
Why do 'neutral' parenthesis cause errors in R (or maybe the tidyverse)?
user_66614260
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3
2
253
dplyr r
Join data frames and select random row when there are multiple matches
user_48767940
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3
4
896
data.table dplyr r join
Renaming columns excluding a certain set of columns
user_74654620
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3
3
153
dplyr rename r
Take mean of digits that are run together in one column
user_87422370
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4
6
198
dplyr tidyverse r
Chop off the first letter of every variable name
user_116292470
•
5
4
1025
dplyr tidyverse r
R code not working to merge data (unduplicate) in columns based on identical values
user_116281900
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3
1
332
dplyr r
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