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Frank

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1617.40 (1,172nd) 		Reputation
57,070 (1,677th)
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Title Δ
Adding a variable based on values in another table +0.05
Aggregate columns specified in list +0.27
R: data.table custom function on subset 0.00
lapply - Create new variables, based on current variables, conditio... 0.00
Matching dataframe columns: one int and another is list 0.00
How to delete duplicate rows (the shorter ones) based on certain co... -0.58
data.table difference between rows of non-consecutive records of sa... +0.30
R: Using get and data.table within a user defined function -2.37
Create a new column from different columns of one data frame condit... +0.29
How to change a variable at the nth occurrence of a value in anothe... -2.28
Create a new factor/variable with levels based on "N" con... -2.98
Subsetting data into different tables from one table with condition +1.06
Count Multiple Consecutive Events by Group w/ Starting Year +1.62
How to create groups based on conditions +1.07
How to split a large character into lines, based on time-stamp patt... +0.20
Odd behaviour of data.table's update on non-equi self-join 0.00
Using dcast.data.table to transform from long to wide only for subs... 0.00
Can you make dplyr::mutate and dplyr::lag default = its own input v... +0.30
Fill sequence by factor +0.24
New columns based off existing column and column located next to it +0.81
How to reflow long to wide only part and summarise the rest? -0.19
Improve efficiency linking data from two data frames +0.30
Matching two dataframes and pulling in a maximum value +1.05
Defining closest observation in a data table -2.32
How to 'Unstack' list in R when some of the entries in the... +1.18
data.table update join using a constant +0.94
Extract rows with duplicate values in two or more fields but differ... +0.59
convert group variable to group name after dplyr::group_by in r -0.95
Fill missing dates with previous value by group 0.00
Random binary matrix with row and column sum constraints 0.00
Function for returning cases that are unique between data sets +0.29
Join in data.table with multiple matches 0.00
r - Conditionally subtract two data tables +1.12
Fill value backwards from occurence by group with condition +0.68
R data.table remove rows where one column is duplicated if another... +1.05
How to sort odd and even numbers of an array in a specific format +0.78
Group vector on conditional sum -0.58
Generate all possible combinations of rows in R? +0.05
Create a mapping table of duplicated id / keys +1.35
R: Group by / loop through one column of data frame +0.30
Assign a binary vector based on blocks of data within another vector -2.24
Comparing columns uptill certain index in R 0.00
R: merging sorted numeric input into intervals +1.15
Filter multiple R data.table columns to eliminate outliers 0.00
R, Cumulative Sum in Reverse 0.00
Conditionally selecting last N values within a group by another col... +1.34
How to write a R function to ensure that we get a variable but not... -0.19
Subset common rows from multiple data frames +0.30
R: how to use expand.grid to generate combinations based on group 0.00
How do I extract the first number that occurs after a matching patt... +1.35