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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 ... 33
Title Δ
Updating column based on previous row values 0.00
Create vector of same size in R or awk +0.59
Group by ID and filter only the group that has maximum mean -0.47
Unnesting results of function returning multiple values in summarize +1.08
How to create combinatory variable in R data.frame? +0.46
Aggregate data.table based on condition in another row 0.00
Create matrix of lead variables +0.21
Populate column which a range of possible values in other columns:... -1.07
Merge same column names of a logical/binary dataframe -2.22
How to remove words not in caps in R? +0.92
Assign values to a vector by groups 0.00
Add characters to existing cells with condition R +0.20
Decreasing order of varaibles (columns) based on ranking in R +0.65
Drop subgroup of obs in dataframe if first observation of group is na 0.00
Removing string out of string rowwise in data.frame using another c... 0.00
How to compare values of a data frame to values in another data fra... 0.00
How to merge multiple columns in one in R 0.00
How can we apply a function to a column vector from every set of co... +0.85
R: calculating difference in rows based on specified value +0.66
Need to compare two dataframes of different length and update a col... +0.22
Return first occurring 2nd largest value in data frame rows using c... +0.22
How to select columns according to values in a colum? +0.21
how do you summarize factors in data frame every 5 minutes -1.07
How to compare two data frames/tables and extract data in R? +0.80
Rank data with subsets 0.00
Cumulative sum of factor variables +1.23
aggregate a column that contains numbers and strings +0.22
How to stretch a data frame by decollapsing a column containing vec... +1.03
Count number of occurrences of 2 values in different columns -0.71
Most efficient way to turn factor matrix into binary (indicator) ma... -2.34
R: Create matrix of values from other table +0.90
Can't replace NA's with Date 0.00
data.table in R: Replace a column value with a value from same colu... -2.12
How to efficiently split a big data.table into two according to a r... +0.55
Sum IF Multiple Criteria with a Difference - R -0.09
R matrix: input zeros in columns with lowest values -1.92
Merging rows in R +0.21
How to encorporate a loop into my data subsetting -0.14
Count the occurrences of factors +0.87
Replace Some Variable Values with Variable Names -1.10
How can I transform a long-formated data frame to a wide-formated o... -0.02
Identifying rows which all elements are missing values-R -0.87
Reformat data from long to wide +0.21
R Programming: Logical test of Previous/preceding/successive Column +0.84
Add a series of elements in different locations within a vector +0.71
Sort table unique parameters +0.79
Subset a data.table given the row index for each group +0.93
dplyr separate returning error -2.66
Count the number of values in a window of a data.table per group +1.12
Vectorize access to columns in R 0.00