Pull out a single variable

Pull a single variable from a data.table as a vector.

pull.(.df, var = -1, name = NULL)

Arguments

.df

A data.frame or data.table

var

The column to pull from the data.table as:

• a variable name

• a positive integer giving the column position

• a negative integer giving the column position counting from the right

name

Optional - specifies the column to be used as names for the vector.

Examples

df <- data.table(
  x = 1:3,
  y = 1:3
)

# Grab column by name
df %>%
  pull(y)
#> [1] 1 2 3

# Grab column by position
df %>%
  pull(1)
#> [1] 1 2 3

# Defaults to last column
df %>%
  pull()
#> [1] 1 2 3