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jay.sf

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1499.39 (3,785,929th) 		Reputation
5,881 (27,784th)
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Title Δ
How to filter rows that contain a string in any column in a dataframe -0.86
How to round integer by intervals of 500 in R -0.43
put columns in order by number ending in R +0.26
Matrix of combinations of two vectors -1.60
How to gather columns in several steps in R without losing grouping -0.77
How to automate data labels on descending bars? 0.00
repeating apply with different combination of cols +0.78
How to return a result in a new column from a number code 0.00
How to speed up a for loop in R for a nested matrix matching and co... +1.32
Multiple if statements within loop in R +2.20
How to plot simple vertical line with abline() in R? +1.51
How to plot simple vertical line with abline() in R? -0.27
How to modify a txt file in R that is not in the correct R format? 0.00
How to return the last matching condition row per group? -1.19
What is the best way in R to identify the first character in a stri... -0.42
How to change time in combined time-date variable (POSIXlt)? +0.54
Interaction of sample and rnorm function in R? 0.00
cut date vector with self-defined breaks +2.62
How to customize base R plots and subplots in detail? 0.00
How can I switch the positions of the first and last element of a c... +0.07
Filter rows in data.frame based on the length of values in all groups -1.31
Identifying positions of the last TRUEs in a sequence of TRUEs and... +1.53
How to print or cat text into pdf() in R without markdown 0.00
How to use lapply to subset list of dataframes based on dfs from a... -1.52
Conversion from Date to POSIXct object - error by one hour -0.43
how to use if to create column of df 0.00
How to change values in unnamed first column -0.46
How to fast convert different time formats in large data frames? +1.22
Recommended way to subset two vectors with the same index vector -0.16
Arrange/sort columns of dataframe for a stacked barplot +0.56
Groupwise mathematical operation with iteration over sequence that... -0.92
Counting number of non zero observation by group +1.61
Create a sequence of numbers that increments for every change in an... +0.56
convert date in Month-Year format to last date of month -1.29
Grouping by sequence and then finding minimum value in a column -1.70
set ... to na when using read_excel() -0.11
Calculate relative change in time by group -1.93
stack the data frames on top of each other and return one single da... -1.69
I want to calculate the mean age of people going to each movie usin... -0.21
R rbind a dataframe of dataframes -0.73
Trying to merge two data frames without using merge() and using uni... -0.89
R Fast nested list iteration +0.54
spread() where non-unique values are put into a new column -0.09
Convert list of indices and values to matrix +0.30
How to calculate re-occurrence rate of events in r data frame -0.46
How to convert four columns into two columns -1.25
Is there any method to combine data frames properly? +0.04
Remove NA in 3D array and reshape 0.00
How can I create a string using toString? 0.00
Substracting means of the elements from list -0.69