Category "dplyr"

Taking only the maximum values of duplicate IDs for all columns of a data frame in R

I have data frame of 24525 rows and 22 columns. Last column is the ID column, other are numeric. Number of unique IDs is 18414 and some IDs are repeated more th

Using dplyr to conditionally replace values in a column

I have an example data set with a column that reads somewhat like this: Candy Sanitizer Candy Water Cake Candy Ice Cream Gum Candy Coffee What I'd like to do

Using dplyr to conditionally replace values in a column

I have an example data set with a column that reads somewhat like this: Candy Sanitizer Candy Water Cake Candy Ice Cream Gum Candy Coffee What I'd like to do

How to add a total distance column in 'flights' dataset? DPLYR, Group_by, Ungroup

I am working with 'flights' dataset from 'nycflights13' package in R. I want to add a column which adds the total distance covered by each 'carrier' in 2013. I

dplyr::select function clashes with MASS::select

If I load the MASS package: library(MASS) then load try to run dplyr::select, I get a error: library(dplyr) mtcars %.% select(mpg) # Error in select(`__pre

Calling user defined functions from dplyr::mutate

I'm working on a project that involves many different tibbles, all of which have a period variable of the format YYYYMM. Below is an example of how all my tibbl

Calling user defined functions from dplyr::mutate

I'm working on a project that involves many different tibbles, all of which have a period variable of the format YYYYMM. Below is an example of how all my tibbl

Trying to be benchmark dplyr vs data.table

Why does this code not work? How can I benchmark these to expressions? library(data.table) library(dplyr) dt <- as.data.table(mtcars) (lb <- bench::mar

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