Nothing
## ---- echo = FALSE------------------------------------------------------------
knitr::opts_chunk$set(collapse = TRUE, comment = "#>")
set.seed(1014)
options(dplyr.print_max = 10)
## -----------------------------------------------------------------------------
library(tibble)
classroom <- tribble(
~name, ~quiz1, ~quiz2, ~test1,
"Billy", NA, "D", "C",
"Suzy", "F", NA, NA,
"Lionel", "B", "C", "B",
"Jenny", "A", "A", "B"
)
classroom
## -----------------------------------------------------------------------------
tribble(
~assessment, ~Billy, ~Suzy, ~Lionel, ~Jenny,
"quiz1", NA, "F", "B", "A",
"quiz2", "D", NA, "C", "A",
"test1", "C", NA, "B", "B"
)
## ----setup, message = FALSE---------------------------------------------------
library(tidyr)
library(dplyr)
## -----------------------------------------------------------------------------
classroom2 <- classroom %>%
pivot_longer(quiz1:test1, names_to = "assessment", values_to = "grade") %>%
arrange(name, assessment)
classroom2
## -----------------------------------------------------------------------------
relig_income
## -----------------------------------------------------------------------------
relig_income %>%
pivot_longer(-religion, names_to = "income", values_to = "frequency")
## -----------------------------------------------------------------------------
billboard
## -----------------------------------------------------------------------------
billboard2 <- billboard %>%
pivot_longer(
wk1:wk76,
names_to = "week",
values_to = "rank",
values_drop_na = TRUE
)
billboard2
## -----------------------------------------------------------------------------
billboard3 <- billboard2 %>%
mutate(
week = as.integer(gsub("wk", "", week)),
date = as.Date(date.entered) + 7 * (week - 1),
date.entered = NULL
)
billboard3
## -----------------------------------------------------------------------------
billboard3 %>% arrange(artist, track, week)
## -----------------------------------------------------------------------------
billboard3 %>% arrange(date, rank)
## -----------------------------------------------------------------------------
tb <- as_tibble(read.csv("tb.csv", stringsAsFactors = FALSE))
tb
## -----------------------------------------------------------------------------
tb2 <- tb %>%
pivot_longer(
!c(iso2, year),
names_to = "demo",
values_to = "n",
values_drop_na = TRUE
)
tb2
## -----------------------------------------------------------------------------
tb3 <- tb2 %>%
separate(demo, c("sex", "age"), 1)
tb3
## -----------------------------------------------------------------------------
tb %>% pivot_longer(
!c(iso2, year),
names_to = c("sex", "age"),
names_pattern = "(.)(.+)",
values_to = "n",
values_drop_na = TRUE
)
## -----------------------------------------------------------------------------
weather <- as_tibble(read.csv("weather.csv", stringsAsFactors = FALSE))
weather
## -----------------------------------------------------------------------------
weather2 <- weather %>%
pivot_longer(
d1:d31,
names_to = "day",
values_to = "value",
values_drop_na = TRUE
)
weather2
## -----------------------------------------------------------------------------
weather3 <- weather2 %>%
mutate(day = as.integer(gsub("d", "", day))) %>%
select(id, year, month, day, element, value)
weather3
## -----------------------------------------------------------------------------
weather3 %>%
pivot_wider(names_from = element, values_from = value)
## -----------------------------------------------------------------------------
song <- billboard3 %>%
distinct(artist, track) %>%
mutate(song_id = row_number())
song
## -----------------------------------------------------------------------------
rank <- billboard3 %>%
left_join(song, c("artist", "track")) %>%
select(song_id, date, week, rank)
rank
## ---- eval = FALSE------------------------------------------------------------
# library(purrr)
# paths <- dir("data", pattern = "\\.csv$", full.names = TRUE)
# names(paths) <- basename(paths)
# map_dfr(paths, read.csv, stringsAsFactors = FALSE, .id = "filename")
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