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Rating Stats for

Frank

Rating
1617.40 (1,172nd)

Reputation
57,070 (1,677th)

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Title	Δ
R: Increment Rank when the column group changes	+1.57
Regex for rectangle brackets in R	+0.33
Percentage of First Calculation in R	+0.52
How can I split a character string into column vectors with a 1/0 v...	+1.39
Find top deciles from dataframe by group	+1.41
Fastest way to do subsetting in R	0.00
copy as long as value does not change in R	+0.41
subsetting with dplyr or other packages in R	-0.28
Why is it faster to evaluate in `j` than with `$` in a `data.table`?	-1.38
R data.table apply function to sum of two columns	0.00
omitting NA values with data.table	-1.46
Make a lookup table from a data.frame	0.00
How to do an X[Y] data.table join, without losing an existing main...	0.00
Using the split function to group a dataframe by factor, alternativ...	0.00
Find fastest way to get all intervals between identical elements in...	+1.36
R data.table group by multiple columns into 1 column and sum	-1.11
Selecting rows or columns with data.table R?	+0.49
Adding na.rm to Custom R Function with sapply	-1.66
subsetting rows in data.table with "wildcards"	-1.48
R: Count objects in column-list	-0.87
How to add column 1 of second csv file under the column 1 of the fi...	+0.12
join two data frames based on user defined function	+1.31
Using data.table on large dataset - need to add column that represe...	-1.31
Speedy test on R data frame to see if row values in one column are...	-1.04
strange data.table behavior when grouping by all columns in data.ta...	0.00
Modification of "data.table" to give first 10% of each gr...	0.00
Assignment via `:=` in a `for` loop (R data.table)	0.00
Increase speed with rbindlist does not work with two for loops in r	0.00
Allocating id/factor/categories based on a group of values for each...	0.00
Manipulate columns by their name pattern in a R data table	+2.35
Matching all pairs of 2 vectors to third column	0.00
R-Subset of a data frame conditional to another data frame	0.00
data.table: how to filter lines with %in% when not all variables ar...	-0.89
R data.table create new column based on maximum of row	+0.10
Operations on data table with variable column name	+2.37
how do you build a linear model not knowing the column names in dat...	+0.75
Logical check: Find first item in a run of one or more	0.00
Calculating net present value of a series of columns in R data.table	+0.36
R: Return ids where no entries for row match criteria	0.00
Progressively find most frequent item in list in R	+0.27
Create new variable in data table based on conditions on other vari...	0.00
background subtraction in a table	+2.32
Is there a way to order output by multiple columns within the aggre...	0.00
Creating multiple dummies from an existing data frame or data table	0.00
R- outer with matrix	0.00
R subset data.frame columns by group to maximize row values	+0.14
All N Combinations of All Subsets	-0.16
Split dataset, apply different operation on each group, and then co...	+1.71
Cartesian product in Mata	-0.49
Operations on rows of dataframes in a list	0.00