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 ... 14 15 16 17 18 ... 33

Title	Δ
Extract data from data.frame based on coordinates in another data.f...	-0.04
Data frame manoeuvre	+0.31
R duplicated function not handling incomparables	0.00
R: Split dataset by n	+1.35
R : Output of the command y[1]:y[3]	0.00
R vectorized matrix into numeric data frame with preserving factors	+0.31
Apply paste over a list of vectors to get a list of strings	0.00
How to fill missing values from other variable?	-1.10
How to index and multiply two matrices efficiently?	-0.65
do calculations for specific rows in R	+0.30
R: How to get the maximum value of a datetime column in a time seri...	+0.30
Number of maximums in each row and more	+0.06
How to change a value using `sub`	-0.99
R- selecting a row based on characteristics of another column in th...	-0.25
R alternate two/four vectors after every two/four values	+0.31
The most effective way to merge/combine two data sets by overlappin...	-1.01
R get monthly means from dataframe of several years of daily temps	+0.82
Creating a matrix with matching x and y labels for columns and rows	+0.02
Apply function to all rows in the loop and put the results in new c...	+0.35
How to calculate the duration that a value stayed constant in R?	-0.41
rowwise tabulation in data.table	0.00
Find overlapping regions and extract respective value	+1.08
R: Average nearby elements in a vector	0.00
Update an entire row in data.table in R	+0.31
How do you find duplicated elements of a vector that outputs the in...	0.00
dplyr::mutate to add multiple values	-0.02
select observation by group with max date SQL via R	+0.32
How to remove row based on condition of row above or below	-0.58
Conditioned occurrence calculation in a data frame	+0.80
Combine information from two data frames with dplyr	0.00
data.table, how to reset cumsum (or add a group to group by)	-0.85
Conditional creation of a column in R	0.00
R creating a new vector based on a count of values up to the first...	+1.70
R Dplyr mutate, calculating standard deviation for each row	-0.98
Speedy test on R data frame to see if row values in one column are...	+0.01
R sort summarise ddply by group sum	-0.30
do.call/rbind slower on data.frame/data.table than on matrix?	-1.51
Convert row names into first column	+1.40
Match and find the earliest value in R	+0.09
Making combinations of row values based on another value in R	+1.46
R data.table create dummy column which map existed column	+1.71
If value in column A can not be found in column B, remove row in R	+1.37
Sum columns by group in a matrix	+0.85
Get frequency using two groupings in a dataframe	+1.39
Get index of vector between 1nd and 2nd appearance of number 1	+0.32
How to sum 10 step rows of matrix in Rcpp?	+0.32
Unique string combinations	0.00
converting a dataframe to a list, while grouping via key value pairs	+1.56
How do I apply a function to row subsets of a data.table where each...	0.00
Subset panel data by group	+0.95