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talat

Rating
1671.29 (315th)
Reputation
53,631 (1,824th)
Page: 1 2 3 4 5 6 7 ... 22
Title Δ
Count the months between two dates in a data.table 0.00
dplyr programatic way to filter most recent week +1.28
Event Counter with condition +0.64
window function in data.table without mutating 0.00
How to mutate columns whose column names differ by a suffix? +1.56
to calculate column wise sum for each row & add new columns for... -2.38
Replace a subset of a data frame with dplyr join operations +0.27
Search in a column based on the value of a different column 0.00
lapply with nested list +0.68
Match and count rows containing numeric characters -0.26
generate random sequences of NA of random lengths in a vector +0.80
random sampling of columns based on column group +0.30
Count number of shared observations between samples using dplyr +1.54
Defining elapsed months for every row in a data.table in R +0.68
Fill value backwards from occurence by group +1.07
How to sort semi-numeric strings? +1.07
Mean imputation issue with data.table 0.00
Expand numeric vector elements with constant (natural number) +1.22
Extract rolling maximum value based on column value +1.58
How to find monotonous sequence along with taking into account sequ... 0.00
Count non -repeats for a column 0.00
R - replace column values by numeric values of the same column usin... 0.00
Creating an occurrence matrix for each char from a large number of... +1.02
Conditionally apply pipeline step depending on external value 0.00
switching list elements with dataframe rows +1.46
Combine several columns with NA values in R, but only use NA if non... -0.32
Replace consecutive zeros found at either end of a dataframe in R +0.02
R move column to last using dplyr -0.99
Rolling operation over rows by group in data.table +1.17
Removing gap between last two words in a string in R +0.46
Identify single bouts and correct +0.29
Using grep for "and" instead of "or" +1.24
Efficient method to convert set of ranges in a dataframe to frequen... -0.84
merging more than 2 data frames whilst assigning an identifier fact... +0.76
Mutate new variable based on group-level statistic 0.00
Conditional string split in data.table in R 0.00
How to take first 5 rows by a group without replacement in another... +0.29
R dplyr summarise date gaps 0.00
Subset by multiple ranges +0.21
Sum elements across a list of data.frames +1.16
Sample random rows in dataframe with probability -2.00
Transform multiple variables and save them with new names -0.65
How to rename selected columns using dplyr with new column names as... +1.30
How to count factor and no double count in the same year -0.85
.SD and .SDcols for the i expression in data.table join 0.00
Remove specific rows from data frame conditional on caseid and year -1.18
Replace NA with previous value with limit +1.13
How do I match the minimum of a subset in R, then do a lookup? +1.08
Removing duplicates of only one variable +0.67
Partition groups of data by group 0.00