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1575.13 (3,482nd) 		Reputation
32,295 (3,688th)
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Title Δ
How to perform lag/lead over dataframe depending on the row index 0.00
Loop through and mutate multiple columns using an incrementing vari... 0.00
Parse time and convert to minutes 0.00
Why does lapply with closures give errors? 0.00
Copy a data frame in a function 0.00
How can I fill NA-values in a data frame column based on the values... 0.00
How to extract frequency per datetime stamp -2.60
Multiplication within dplyr to get multiple rows -1.11
Removing observations with identical name based on a variable value -2.08
Only rows where difference between them is less than 'n' in... -2.10
Count how many hours are in specific year -0.43
Finding in which vector does the element belong to -1.26
Across several columns, count instances of pairs +0.03
Check if matrix in a matrix -0.35
How to get the first and last non-Inf, non-NaN, non-NA, non-0 value... +1.32
Number of occurrences of each column (summary) in custom formatted... +1.65
Check if vector in a matrix -1.39
Add column inside named matrix -0.24
How to count the maximum number of simultaneously present entities... 0.00
Sampling from a secondary datatable to the main datatable based on... +1.28
Impute na using average on both sides in row +1.77
Adding binary values to a column based on pre-defined column values +1.67
Reshaping Data Wide To Long: New variables based on Column Names +1.99
Detecting and extracting names from a binary dataframe based on dup... -2.03
Comparing between dataframes to find numbers +/- 1 of the observati... -2.54
How to multiply entire row with a matching row name in another data... +0.45
Extracting the Data basis on system or machine date and time 0.00
Filing one unique column by merging one data frame with several oth... 0.00
Transpose and sum distinct values in R +0.05
Subset row in df after the first row containing a specific value +0.08
Count NAs rowwise from multiple variables provided as vector -0.83
Count the number of rows matching a couple of pattern from a vector... +0.04
Count the number of rows matching a couple of pattern (AND operator... +0.39
How to move dataframe variable names to first row and add new varia... +0.80
arrange columns by names (letters specific) -2.12
Remove first place comma and space between two texts and the last c... -1.46
Append incremental number to specific string in a column +0.37
How do I repeat the last row of a data frame n times, while changin... +0.38
Count rows in dataframe for multiple variables +0.36
distinct cases for two variables by grouping and counting -0.06
Pivoting multiple columns -0.34
apply `mutate_at` for two columns at the same time? +0.37
how to transform time codes into turn codes 0.00
Calculations per sub-groups and reshape dataframe 0.00
Splitting and creating 2 rows out of one in R data table -0.78
How to calculate days until next occurrence? -0.05
How to repeat a function for all rows for each col in R -1.63
ifelse for the entire group (not only one row) 0.00
Convert date to first day of the corresponding month from dataframe -0.28
expanding rows out by two year columns +0.74