Tidyverse

Материал из Letopisi.Ru — «Время вернуться домой»
Перейти к: навигация, поиск

Пакет языка R



  • install.packages("tidyverse")
    • library(tidyverse)


Содержание

Import

Tidy

Transform

dplyr Basics

  • Pick observations by their values
    • (filter()). - filter(flights, month == 1, day == 1)
  • Reorder the rows
    • (arrange()) - arrange(flights, desc(arr_delay))
  • Pickvariables by their names
    • (select()). select(flights, year, month, day) select(flights, -(year:day))
  • Create new variables with functions of existing variables
    • (mutate()). - mutate() always adds new columns at the end of your dataset
  • Collapse many values down to a single summary
    • (summarize()).

Filter

Arrange

Select

select(flights, -(year:day))

Mutate

Summarize

sum(!is.na(x))

not_cancelled %>%
group_by(dest) %>%
summarize(carriers = n_distinct(carrier)) %>%
arrange(desc(carriers))


not_cancelled %>%
count(dest)

Visualize

ggplot(data = mpg) +
geom_point(mapping = aes(x = displ, y = hwy))

ggplot(data = mpg) +
geom_point(mapping = aes(x = displ, y = hwy, color = class))

ggplot(data = mpg) +
geom_point(mapping = aes(x = displ, y = hwy, size = class))

Facets

ggplot(data = mpg) +
geom_point(mapping = aes(x = displ, y = hwy)) +
facet_wrap(~ class, nrow = 2)

Statistical Transformations

ggplot(data = diamonds) +
geom_bar(mapping = aes(x = cut))
ggplot(data = diamonds) +
stat_count(mapping = aes(x = cut))

Coordinate Systems

  • coord_flip() switches the x- and y-axes.
ggplot(data = mpg, mapping = aes(x = class, y = hwy)) +
geom_boxplot() +
coord_flip()

Model


Персональные инструменты
Инструменты
Акция час кода 2018

организаторы проекта