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Frank

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1617.40 (1,172nd) 		Reputation
57,070 (1,677th)
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Title Δ
Gettings head() and tail() where NA is present for many variables -1.96
Generically aggregate columns using data.table +0.15
Counting the result of a left join using dplyr +1.27
String decomposition +0.34
Dplyr conditional windowing +0.87
Create new index / re-index in dplyr +0.77
What's the fastest way to find out how many rows are in a dplyr... -0.10
nested named list to data frame in R -1.00
pairwise analysis in R 0.00
dynamic column names in data.table correlation 0.00
Rolling Text Concatenation with Data.Table in R +0.04
Efficient way to calculate non-na rows vs NA rows in a column -1.47
Create columns of data frame based on rows from another data frame +0.02
dplyr - using mutate() like rowmeans() +0.26
R Order group of names based on condition 0.00
R: How to sum up (aggregate) values of dfs according to column crit... -0.27
Calculating overlap (and distance measures) for categorical variabl... 0.00
How to do row wise operations on .SD columns in data.table +0.41
Finding max of data.table column within range of rows from current... -0.09
Select values from different columns based on a variable containing... +2.23
Dynamic conditions for subsetting in R 0.00
R data table: use function on group except current row -1.12
Reshaping data using tidyr +1.79
remove last NA values in a data.table 0.00
calculate every pairwise quotient of a list of vectors in a datafra... 0.00
Efficiently assign values to specific data table row numbers based... 0.00
Detect numeric vector elements that are within a certain distance f... -1.22
Drop columns when splitting data frame in R +0.42
R: Delete incomplete data sequences 0.00
match() values with tolerance +1.74
dplyr - Group by and select TOP x % -0.12
Is there a way to pass dplyr's `do` function a vector of additi... +1.15
R - extract values from strings +0.24
Efficient Match/Lookup in R +1.13
R dplyr select row of minimum date difference between two separate... 0.00
How to perform a "serial join" in data.table? -0.96
Identify value in 1 column corresponding to equal values in two ano... 0.00
R - How to integrate if any in dplyr? -0.98
Restore matrix row and column names to defaults in R (e.g., [1,], [... 0.00
Elementwise median of list of matrices in R +2.28
Add new column for unique (A, B) or shared (both) groups based on c... +2.13
How to impute values in a data.table by groups? +0.38
Using apply over two lists of different lengths 0.00
Add many calculated columns by grouping variables and then collapse... 0.00
R, subset two data frames with different rows -1.48
Splitting a single column into multiple observation using R -0.75
Use of "list" in data.table's j argument 0.00
How to make data in a single column (long) with multiple, nested gr... 0.00
Data frame transformation in R, normalization according to parameters 0.00
R within() order of operation and logic -0.63