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David Arenburg

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1732.38 (66th) 		Reputation
80,581 (1,024th)
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Title Δ
How do I use dplyr to generate a new column based on rowwise data? +0.74
R: Rearrange specific rows of single-column data frame into new col... -2.35
Subtract specific rows +0.28
R - Merging Two Data.Frames with Row-Level Conditional Variables +0.29
How to replace text in R using regular expression? +1.64
Add frequency based on duplicate row 0.00
Getting the maximum common words in R -0.90
R: Converting Column Values into Their Own Binary Encoded Columns +1.08
Exclude subsequent duplicated rows +0.51
Match and replace operation in data frame in R +1.33
Divide row value by aggregated sum in R data.frame 0.00
Aggregating in R +0.30
How to aggregate data.table on multiple dimensoins +0.29
Filtering on a date using dplyr without changing the variable format -0.63
Is there something in R for automatic conversion of column( of data... 0.00
I Need to have a blank observation after each row in r using datafr... 0.00
Extract and compare column data by date in R -0.22
How can you combine two data frames in r so that the resulting data... +1.79
Combining tapply and 'not in' logic, using R +1.22
R Data Aggregation With WHERE Clause on Group 0.00
which(vector1 < vector2) +1.54
Colmeans in a dataframe by factor variable +0.04
How to extact all columns when using data.table in R? 0.00
Transition between variables R 0.00
Split dataframe on filtered character and make multiple new columns +1.24
R Compare each data value of a column to rest of the values in the... -0.20
How to transform matrix into numeric matrix? -1.65
finding corresponding value for minimal number - r 0.00
Combining two subgroups of data in the same dataframe -1.91
R - gsub a specific character of a specific position -2.39
Order by group sum +1.02
R: Combine list of data frames into single data frame, add column w... +0.97
How to extract values that match certain date? 0.00
error in count_combinations in statar 0.00
Named arrays, dataframes and matrices -0.09
Break list into rows while preserving identifiers in r +0.44
Sub-setting / Matching row and columns in R -0.71
Sampling on factor in R +1.11
Reshape vs. tidyr for repeated measures with multiple dependent var... -0.80
R - difference between sums of consecutive pairs +1.20
Extract House Number from (address) string using r +1.40
Selecting dates in a data.table for new column in r 0.00
Combining multiple lists of variable names in data.table? -1.59
loop through and perform operations with values of a vector 0.00
How to replace a value in a data frame in R? +0.28
Group by using base R +0.29
R programming data frame - returning value based on position -0.27
R: Getting indices of elements in a sorted vector -0.96
How to get rows of a dataframe that contain values between two othe... +0.30
Update non continuous values in vector 0.00