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Is there an R function for sumproduct the last 4 rows in a dataframe?

r dplyr rollapply sumproduct
Updated October 20, 2019 02:26 AM

gather() per grouped variables in R for specific columns

r dplyr tidyr
Updated October 19, 2019 03:26 AM

Nested Match Functions in R

r dplyr
Updated October 19, 2019 03:26 AM

Find predictions for linear model that is grouped_by

r dplyr broom
Updated October 18, 2019 21:26 PM

reduce grouped data frame by intersecting values in each group

r dplyr data.table
Updated October 18, 2019 01:26 AM

Splitting data of a column and placing them into two consecutive rows for the same observation

r dataframe dplyr
Updated October 17, 2019 16:26 PM

Unusual (to me) data structure: count how often two columns mutually point to one another

r dplyr tidyverse
Updated October 17, 2019 07:26 AM

Applying functions stored in a dataframe to another dataframe in R

r dplyr tidyverse purrr tidyeval
Updated October 15, 2019 21:26 PM

Converting SAS script in R and create a loop

r loops dplyr sas
Updated October 12, 2019 01:26 AM

Inner join on large dataset best practices

r parallel-processing dplyr bigdata
Updated October 12, 2019 01:26 AM

subseting dates and times in dplyr

r select filter dplyr mutate
Updated October 11, 2019 22:26 PM

Removing NULL values from the table

r dplyr tidyverse
Updated October 11, 2019 17:26 PM

insert if statement after pipe %>% to return error message within custom function

r function if-statement dplyr return
Updated October 10, 2019 10:26 AM

R Studio - how to store the output as dataframe (dplyr)

r dplyr
Updated October 09, 2019 21:26 PM

R Determine if a value ends in 0

r dplyr
Updated October 09, 2019 12:26 PM

In tidyr version 1.0.0.9000, how to simplify nested columns to lists?

r dplyr tidyverse nest tidyr
Updated October 08, 2019 21:26 PM

Estimate the quantile of each values according to its vector with dplyr mutate_at

r dplyr mutate quantile
Updated October 08, 2019 15:26 PM

Faster way to make data frame of summary statistics by time variable across partitions of dataset

r dplyr automation subset purrr
Updated October 06, 2019 13:26 PM

How to create a variable from a condition on other indexed variables in an efficient way?

r dplyr purrr mutate
Updated October 05, 2019 22:26 PM

Repalce 1 by random values in R

r dplyr
Updated October 05, 2019 18:26 PM

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