dplyr_verbs: The dplyr verbs implemented for disk.frame

In xiaodaigh/disk.frame: Larger-than-RAM Disk-Based Data Manipulation Framework

The dplyr verbs implemented for disk.frame

Description

Please see the dplyr document for their usage. Please note 'chunk_arrange' performs the actions within each chunk

Usage

## S3 method for class 'disk.frame'
select(.data, ...)

## S3 method for class 'disk.frame'
rename(.data, ...)

## S3 method for class 'disk.frame'
filter(.data, ...)

## S3 method for class 'disk.frame'
mutate(.data, ...)

## S3 method for class 'disk.frame'
transmute(.data, ...)

## S3 method for class 'disk.frame'
arrange(.data, ...)

chunk_arrange(.data, ...)

## S3 method for class 'disk.frame'
distinct(...)

chunk_distinct(.data, ...)

## S3 method for class 'disk.frame'
glimpse(.data, ...)

Arguments

.data	a disk.frame
...	Same as the dplyr functions

Examples

library(dplyr)
cars.df = as.disk.frame(cars)
mult = 2

# use all any of the supported dplyr
cars2 = cars.df %>% 
  select(speed) %>% 
  mutate(speed2 = speed * mult) %>% 
  filter(speed < 50) %>% 
  rename(speed1 = speed) %>% 
  collect

# clean up cars.df
delete(cars.df)

xiaodaigh/disk.frame documentation built on Feb. 3, 2023, 10:04 p.m.