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user2100721

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1456.77 (4,530,337th) 		Reputation
2,894 (58,402nd)
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Title Δ
Nested Loop using apply functions in R 0.00
joining 2 data tables without any keys, but with some logical link -1.99
R summarize many to many relationship between two column's valu... -1.96
Count of specific value in column +0.53
Using results of a match to create a win/loss record 0.00
Merging two data sets by using common variables without listing all... 0.00
Convert string to numberic - all data has been replaced when there... 0.00
How would I replace all but the last period with underscore? +3.24
Preparing data for two way anova in R -1.57
handling large CSV file with over 30 million entries in browser 0.00
replace NA of a matrix with some values +4.46
Transform Names Matrix into Dataframe rows +0.42
How to add new column in R during for loop? +0.22
how to select columns which share specific name in a data frame +1.59
R: Calculating displacement of variables in order +4.88
Split data frame elements with semicolon in R 0.00
Adding vector elements with condition in R -0.21
find the number of values within different range in each column -3.78
find unique strings in data frame variables -3.44
Loop with changing table names in R 0.00
Selection of rows from 2 dataframes based on multiple conditions +0.65
How to return the index of a column containing minimum value in a d... +0.67
Add and fill new columns based on match between two existing column... -3.37
Filter all values before max value using dplyr -1.14
R: Preserve consecutive numbers in matrix -3.39
Take the difference based on ID -0.72
How to group_by only if the group contains a certain value in a spe... -1.72
Weighted lagged calculation in R 0.00
Extract string before "|" +2.93
Count number of days since a specific date -1.58
Match ID and column names and update the data +0.52
Concatenate duplicate dataframe values in R -2.15
lapply in lapply in data.table 0.00
How to extract information of a vector in a data frame correspondin... -3.08
R: Access the last subelement of each element in a list -2.26
Calculate rolling standard deviation from the 20th row onwards +3.15
Gathering 4 data sets based on the names in row 0.00
Counting the number of ordered pairs in matrix in R -3.26
Count how many times an element is repeated or not repeated in a se... -3.04
Remove rows from a dataframe that match two columns in another data... -3.86
Split a data frame column containing a list into multiple columns u... -2.71
Elegant solution to count rolling two dice? +2.64
How can I complete this Fibonacci sequence evaluation in R? +4.39
Using an apply function to select a window of cells from a matrix? 0.00
Change matrix dimension -2.55
GROUP_CONCAT with dplyr or R +0.18
Rstudio table of means from a large dataset +0.41
Add column to dataframe which is the sd of rnorm from previous colu... -3.09
How to convert dd/mm/yy to yyyy-mm-dd in R +4.59
R fill a matrix in a loop -3.79