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Rating Stats for

Arun

Rating
1646.88 (617th)

Reputation
97,405 (767th)

Page: 1 2 3 ... 26

Title	Δ
efficient way to extract conditional data by group from data.table,...	0.00
How to select the first n rows of each group in specified columns (...	+0.65
Non-equi join using data.table: column missing from the output	0.00
data.table speed is slower when assigning a column	+1.28
categorize based on date ranges in R	+0.46
In R, looking for better way to get the max value out of subgroups...	+0.33
Calculate a team's lead at regular intervals based on scoring d...	+0.56
Compare and merge two dataframes	-0.34
Select range ID with the highest score using foverlaps in R	+0.29
How to compute the mean in different categories using left_join and...	-1.91
data.table grouping separately on numeric and text variables	0.00
Change values for a random selection of a data.table subset	-0.96
Map Value based on Specified Intervals	0.00
Fitting different models to each subset of data in R	-0.14
Match and replace columns of dataframe by multiple conditions	0.00
R: Matching on closest date (efficiency issue)	+0.28
R - merge and update primary dataset	+0.75
Fill in the same value for each row by group in R	+1.72
Cumulative sum base on the value of different columns in the same r...	-0.46
Create cumulative counter variable per-user, with multiple conditions	+0.31
Shift a column of lists in data.table by group	0.00
Fill the same value for each group in R	-0.81
Joining 2 datasets and creating new rows where matches are found	-0.08
Replacing impossible values with NA using R's data.table	+1.42
Check of microbenchmark results fails with data.table changed by re...	0.00
Combine datasets by date range and categorical variable	-0.21
Comparing two dataframes based on a condition	-2.84
Remove duplicated rows (based on 2 columns) in R	+0.28
R data.table - how to interpolate missing values over FIXED rows in...	0.00
How to remove rows from a dataframe that have overlapping start and...	+0.31
joining 2 data tables without any keys, but with some logical link	+0.25
left outer join in R with conditions	0.00
Join dataframes by id and overlapping date range	-0.47
Recast in R with sum+product	-0.26
Assigning 1 or 0 conditionally to a new column based on values from...	+0.31
R implementation to union of overlapping rectangles	0.00
Seeking a cleaner way to avoid nested if statements (with sapply)	-1.68
Looking for ranges in dataframe values	+0.62
How to erase rows in a data frame R	-1.51
match with an interval and extract values between two matrix R	+0.77
How to speed up this conditional join (for-loop is slow)?	0.00
Identifying start and end dates for medications with overlapping re...	-0.70
Couple the data in all possible combinations	-1.77
R: Efficiently find the correct range my value fits in	0.00
Counting rows based upon conditional grouping with dplyr	-0.20
Error in selecting rows with "!" operator in data.table	+1.24
R data.table Multiple Conditions Join	0.00
dplyr - arrange, group, compute difference in dates	+0.53
How do you change the data table rolling join condition from weak i...	0.00
efficiently subsetting data.table multiple times	-0.52