StackRating

An Elo-based rating system for Stack Overflow

Home | About | Stats and Analysis | Get a Badge

Rating Stats for

David Arenburg

Rating
1732.38 (66th)

Reputation
80,581 (1,024th)

Page: 1 ... 10 11 12 13 14 ... 33

Title	Δ
Get frequency across columns in R	+0.72
Combining rows based on the id in R	+1.19
R data table - calculation for each row using all rows before curre...	+1.44
Matching timestamped data to closest time in another dataset. Prope...	-1.76
R grep for each element in vector	-0.78
R:Extracting words from one column into different columns	-1.62
conditional elseif statements in R	+1.03
dplyr + group_by and avoid alphabetical sorting	+0.04
How to use separate() properly?	+0.28
Split Date into Year and Month in data.table	+0.27
Select rows within a particular time range	+0.40
R regex to fetch strings between characters at specific positions	+1.59
How to count frequencies of certain character in a string?	-0.25
Calculating mean for every second value in a dataframe	+0.27
rearrange data.frame to get the sequential order of products	+0.79
Selecting frequent values from multiple columns from R table	+1.40
change factor values in a row by factor values of another row	-0.19
Serial modification of objects in R	0.00
Keep the second occurrence in a column in R	+1.00
Count number of rows meeting criteria in another table - R PRogramm...	+0.60
How to convert class of several variables at once using dplyr	+0.24
How to normalize a model.matrix?	-0.11
join two data tables and use only one column from second dt in R	+0.27
Replace rows in one data frame if they appear in another data frame	+0.24
Create a Triangular Matrix from a Vector performing sequential oper...	+1.47
Test two columns of strings for match row-wise in R	+0.56
Transforming irregular data into usable format in R	0.00
Creating indicator column based on conditional categorizing of rows...	-1.55
to calculate summary of multipl. two column in dataset in R, loops	+0.27
Resetting TIME column when AMT > 0	-1.88
Search multiple fields in two data Frames in R	0.00
R - Vectorized implementation of ternary function	-0.07
Collapse data frame	0.00
Create sequence with data.table	-1.25
R comparing 2 dfs to sum data between values	0.00
Replace NA's with a vector	0.00
R average counts based on weekdays and weekends	0.00
Conditional replacement of character variable in R	+0.58
R - delete all rows with value in column 1 that has negative value...	-2.32
Using Table to Group: invalid 'type' (character) of argument	0.00
Row indices in data.table in R	+1.42
How to convert column values to rows for each unique value in a dat...	+0.46
Finding gaps between intervals using data.table	-1.09
How do I match table entries to a second table's list entries i...	+0.89
Conditional group by join in R	+0.26
R: efficiently identifying highest N values of variable Z by group X	0.00
converting a dataframe to a 2 column dataframe based on vaues	+0.86
Reordering rows in a data.frame?	+0.27
Printing the sorted elements of a matrix in descending order with a...	0.00
Apply NA to the rows that meet a condition in R	0.00