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Rating Stats for

David Arenburg

Rating
1732.38 (66th)

Reputation
80,581 (1,024th)

Page: 1 2 3 ... 33

Title	Δ
mutate_at (or across) and ifelse statement	+1.33
Sum amount last 6 month prior to the date of transaction	+0.44
Join two datasets and fill information for time intervals in r	+0.28
Dataset multiplication, multiplying the ratios of DT2 with totals o...	+0.72
Forward fill rows in a r data table	+1.08
changing one value according to some conditions in a dataframe	-1.44
Extracting parts of text string between two characters	-2.64
Summing values in R based on column value with dplyr	+0.83
Populating a "count matrix" with permutations of R data.t...	+0.21
How to find synchronous IDs based on timestamp and value	+0.78
apply lag or lead in increasing order for the dataframe	+0.97
Removing rows where multiple columns equal an exact number R	+0.48
Identify first column values per ID and operate based on that value	0.00
Find first previous lower value for each value in dataframe column	+0.21
Sum over rows by group (many columns at once)	0.00
R ~ Vectorization of a user defined function	+0.63
How can I locate the first instance of NA in a row within a data fr...	+0.07
R: classifying a text variable	+0.53
Match a vector inside a vector	-0.95
r data.table behaviour with booleans as column selector	+0.65
Interpolation using ratios in overall data	0.00
Use dynamic (variable) string as regex pattern in R	+0.56
R/data.table: separate columns and count occurences	-0.94
Assign quantitative variables to data points in the data frames in R	-1.20
How to exclude certain lines when parsing tab-delimited data into a...	0.00
How to parse tab-delimited data (of different formats) into a data....	-1.71
Different results when subsetting data.table columns with numeric i...	0.00
How get NA for values which are not found in a dataframe	+0.19
Inner_join with two conditions and interval within interval condition	+0.60
Relative variance (Vectorised implemantation) in R	+1.12
Adding equivalent columns of relevant data in R	+0.12
Separate string after last underscore	-3.12
how to find dates that overlap from two different dataframes and su...	0.00
Parsing String and splitting it in R	+1.01
Conditionally replace missing values depending on surrounding non-m...	-0.28
Creating Data set for Change Point Detection Output performed over...	0.00
How to sort a vector based on a list in R	-2.40
Replacing NA values using a rolling window	+0.40
replace value in data.frame row by row	+0.96
Fastest way to look up value in previous period?	0.00
Unexpected error message while joining data.table with rbindlist()...	0.00
Conditional join in data.table?	0.00
add leading 0 at a specific position in a string (R)	-1.25
Rank values column-wise	+0.76
sapply() returns list instead of a vector	0.00
Merge data.table by two LOWEST nearest variables	0.00
Evenly distributed differences between their positions	0.00
How to get quick summary in data.table with a look-back window?	+0.20
how to get quick summary of count in data.table	+0.18
Count number of 1's from right to left, stopping at the first 0	+0.81