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Uwe

Rating
1496.72 (4,013,663rd)
Reputation
24,370 (5,280th)
Page: 1 ... 15 16 17 18 19 ... 24
Title Δ
Extract rows with duplicate values in two or more fields but differ... +0.16
Sorting formatted dates in R +0.00
is there an elegant way to use combination of "Primary Key val... 0.00
Convert Factor to Date (Year-Month) +0.51
Multiple comparison between two dataframes without using "for&... +0.52
if condition is true find max in 3 consecutive rows and report it i... +1.70
Finding all overlaps in one iteration of foverlap in R's data.t... 0.00
Efficient cross join with aggregation and filter +0.51
Using Countif on Dates in R -0.06
wide to long data table transformation with variables in columns an... +0.02
Transform year/week to date object 0.00
Identify eventlogs in a vector before and after a certain date in r 0.00
How to segment a data.frame according to certain amount of consecut... 0.00
Selecting a row from a dataframe based on condition in R -0.44
Divide an element of a vector between the number of consecutive 0 w... -0.54
Joining data frames by taking one column and adding it to a row +0.23
Add two data frames based on a column -0.75
How to add a index by set of data when using rbindlist? +0.51
Aggregating across list of dataframes and storing all results 0.00
How to identify the source of the data when reading all of the file... -1.93
number of items to replace is not a multiple of replacement length... 0.00
Calculate mean value for ID keeping Panel Data Shape -0.01
Combining and Filtering Daily Data Sets in R +0.49
Add a column to the next value of another column dynamically in R b... +0.23
Count instance of datetime overlap across all rows in R dataframe 0.00
Plot Multiple Column in a Time Space Graph 0.00
How to add a column with specific values in a list of data frames +0.35
Formatting Unconventional Date +2.58
R, Complement on aggregating data.table +0.50
How do I avoid a slow loop with large data set? +0.93
How to merge lists of vectors based on one vector belonging to anot... +0.17
Time intervals between resightings of several individuals 0.00
Custom sorting of dataframe by column with duplicates -1.42
How can I remove all cells with "NA" value by columns +0.26
Vertical Line ggplot for x categorical variable (not date) -0.23
R sort by group using max value of each group -0.64
How to refer to another column of a df in the function inside lapply? 0.00
R: merge based on multiple conditions (with non-equal criteria) -1.02
Identify the original row numbers of filtered rows -1.24
Identify the original row numbers of filtered rows +0.93
Choosing different amount of elements from each group in R -0.96
Complex/Mixed sort column in data frame 0.00
Comparing dates inside group using same reference -0.79
Creating a unique ID variable as combination of variables -0.47
Concatenate rows of a column based on values of another column -1.88
How to apply a function to a subset of data.table using by and expo... 0.00
R pick up the starting date and ending date of the Recession period 0.00
How to replace values after a specific event in a data frame? +0.15
rolling count of var1 or var2 by group in R -0.23
Group rows into rolling sets of 3 and combine each set into a singl... 0.00