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New posts in data.table
Determine whether column values are unique in data.table
Dec 12, 2022
r
data.table
Vectorize data.table like, grepl, or similar for big data string comparison
Dec 13, 2022
r
data.table
R data.table: (dynamic) forward looking Cross-Joins
Dec 13, 2022
r
data.table
cross-join
incremental counter within dataframe only when a condition is met in r
Dec 12, 2022
r
data.table
counter
Test two columns of strings for match row-wise in R
Dec 11, 2022
regex
r
data.table
left outer join with data.table with different names for key variables
Dec 10, 2022
r
data.table
Running Sum in R data.table [duplicate]
Dec 09, 2022
r
data.table
Adding a seasons column to data table based on month dates
Dec 10, 2022
r
data.table
R - Removing the first and last character of a every factor in a data.table
Dec 10, 2022
r
data.table
R: Aggregating History by ID and By Specified Data
Dec 10, 2022
r
data.table
dplyr
Subset by multiple ranges [duplicate]
Dec 10, 2022
r
range
data.table
subset
convert lists of values in a string, separated by two different delimiters, into separate rows
Dec 10, 2022
r
string
data.table
Efficiently Populate Mean Alongside Values in R [duplicate]
Dec 09, 2022
r
statistics
aggregate
data.table
mean
Generate rows between two dates into a data frame in R [closed]
Dec 08, 2022
r
data.table
Number of non-NA records by column, grouped
Dec 08, 2022
r
data.table
R data.table "by" for "i"
Dec 08, 2022
r
data.table
How to compare if any of the elements in a row is same
Dec 08, 2022
r
data.table
Faster equivalent to group_by %>% expand in R
Dec 08, 2022
r
performance
dplyr
data.table
data-manipulation
Combining split() and cumsum()
Dec 07, 2022
r
plyr
data.table
Converting a dataframe from "wide" format to "long" format in R
Dec 06, 2022
r
dataframe
data.table
reshape
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