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Rating Stats for

David Arenburg

Rating
1732.38 (66th)

Reputation
80,581 (1,024th)

Page: 1 2 3 4 5 6 7 ... 33

Title	Δ
collating values on a single row in R dataframe dplyr	+0.56
grep substring following a symbol	-0.21
mapply for all arguments' combinations [R]	0.00
sample data.table rows with different conditions	0.00
How to reverse a number in R	+0.52
How to change final result of loop as a data frame	-0.86
Find values that only occur once per row over large data.table or d...	0.00
Counting previous rows in a data table based on date	+0.21
Grouping a data.table by running intervals	0.00
Finding the average value	-0.80
Getting maximum value in a row in R	+0.21
Find the maximum value in decision tree	0.00
Count leading zeros between the decimal point and first nonzero digit	+0.59
In R, use dplyr's mutate() to create a new variable conditional...	+0.73
Converting for-loop to lapply function on two data frames with if c...	+0.97
Allow .SDcols to vary with grouping variable in data.table	0.00
Copy rows inside data.table based on condition	+0.56
Mean of data frame columns	0.00
R: Efficient way for replacing strings in a data frame(table)	0.00
Create a new column as SUM of two row's elements IF today's...	0.00
Problems with control statement if...else in R	-1.75
Combine two dataframes that have common rows and columns (fill in)	0.00
Depth of a node in partykit	0.00
Calculating the means of many factor columns in a data frame	+0.49
How to append results as a matrix to a dataframe using functions in R	+0.19
Add (not merge!) two data frames with unequal rows and columns	-0.78
Accumulate number of distinct values in a column grouped by another...	+0.20
create a rank column in a dataframe mixing two other columns in R	+0.65
Aggregate data.frame for each day	-0.33
R: Find average of multiple columns, only for the columns where the...	-1.26
R: adding together previous rows in a dataframe	+0.70
Conditional replacement of values in data frame column based off mu...	0.00
How do I subset datetimes and pivot the measurement column in R	0.00
Replace all numbers in a df by median	+1.10
rowwise operation with dplyr	0.00
calculating the frequency of occurrences in every column	+0.44
Merge data.tables keeping most recent rows or appending new ones	+0.21
substring characters from a column in a data.table in R	-0.21
Functions for finding first and last variables in the vector	+0.31
Extract values corresponding to top k of any other column	+0.21
secondary key ("index" attribute) in data.table is lost w...	0.00
sapply an ifelse function on character vectors of varying length [r]	0.00
R make function robust to both standard and non-standard evaluation	0.00
R covert values in rows with string of multiple values to columns i...	+1.21
Data with two delimiters in R	+0.93
How to locate first location in a vector where all the rest of valu...	0.00
Remove columns of dataframe based on conditions in R	-1.16
Sorting the column names of a dataframe using alphabetic or number...	0.00
R: grepl select first charachter on a string	0.00
Replacing specific values in vector with different samples from ano...	0.00