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Code for Introduction to tibbles
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# install library | |
install.packages('tibble') | |
library(tibble) | |
# create tibble | |
tibble(x = letters, | |
y = 1:26, | |
z = sample(100, 26)) | |
# tibble features | |
# feature 1: tibble never changes input's type | |
(t <- tibble(x = letters, y = 1:26)) | |
str(t) | |
# data frame | |
(d <- data.frame(x = letters[1:10], y = 1:10)) | |
str(d) | |
# feature 2: tibble never adjusts variable names | |
# data frame | |
names(data.frame(`order value` = 10)) | |
# tibble | |
names(tibble(`order value` = 10)) | |
# feature 3: tibble never prints all rows | |
x <- 1:100 | |
y <- letters[1] | |
tibble(x, y) | |
# feature 4: tibble never recycles a vector of length greater than 1 | |
x <- 1:20 | |
y <- c('a', 'b', 'c') | |
tibble(x, y) | |
# column names | |
tibble( | |
` ` = 'space', | |
`2` = 'integer', | |
`:)` = 'smiley' | |
) | |
# create tibbles using enframe | |
# vector of browser names | |
browser1 <- c('chrome', 'safari', 'firefox', 'edge') | |
# create tibble from browsers | |
enframe(browser1) | |
# named atomic vector | |
browser2 <- c(chrome = 40, firefox = 20, edge = 30, safari = 10) | |
# create tibble from browsers | |
enframe(browser2) | |
# tribble | |
tribble( | |
~x, ~y, ~z, | |
#--|--|---- | |
1, TRUE, 'a', | |
2, FALSE, 'b' | |
) | |
# create tibble using `as_tibble()` | |
# data frame | |
as_tibble(iris) | |
# lists | |
l <- list(x = 1:32, y = sample(100, 32), z = replicate(32, letters, simplify = FALSE)) | |
as_tibble(l) | |
# matrix | |
m <- matrix(sample(1000, 2600, replace = TRUE), ncol = 26) | |
colnames(m) <- letters | |
as_tibble(m) | |
# table | |
k <- table(mtcars$cyl) | |
as_tibble(k) | |
# tbl_df | |
k <- tbl_df(iris) | |
as_tibble(k) | |
``` | |
# if an object is a tibble using `is_tibble()` | |
is_tibble(mtcars) | |
is_tibble(as_tibble(mtcars)) |
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