reshape_longer: Reshape data into long format

In strengejacke/forgettable:

Description

reshape_longer() reshapes one or more columns from wide into long format.

Usage

reshape_longer(x, columns = colnames(x), names_to = "key",
  values_to = "value", numeric_timvar = FALSE, id = "id")

Arguments

x	A data frame.
columns	Names of variables (as character vector), or column index of variables, that should be reshaped. If multiple column groups should be reshaped, use a list of vectors (see 'Examples').
names_to	todo
values_to	todo
numeric_timvar	todo
id	todo

Value

A reshaped data frame.

Examples

d <- data.frame(
  x = 1:4,
  y1 = rnorm(4),
  y2 = rnorm(4),
  a = c(1, 1, 0, 0),
  b = c(0, 1, 1, 1)
)

# simple reshape of one time-varying variable
reshape_longer(
  d,
  columns = c("y1", "y2"),
  names_to = "time",
  values_to = "new_y"
)

d <- data.frame(
  x = 1:4,
  y1 = rnorm(4),
  y2 = rnorm(4),
  z1 = rep(3, 4),
  z2 = rep(-2, 4),
  a = c(1, 1, 0, 0),
  b = c(0, 1, 1, 1)
)

# reshape multiple time-varying variables
reshape_longer(
  d,
  columns = list(c("y1", "y2"), c("z1", "z2")),
  names_to = "time",
  values_to = c("new_y", "new_z"),
  numeric_timvar = TRUE
)

strengejacke/forgettable documentation built on Jan. 4, 2020, 10:33 p.m.