stringr: str_glue – R documentation

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str_glue

Format and interpolate a string with glue

Description

These functions are wrappers around glue::glue() and glue::glue_data(), which provide a powerful and elegant syntax for interpolating strings. These wrappers provide a small set of the full options. Use the functions directly from glue for more control.

Usage

str_glue(..., .sep = "", .envir = parent.frame())

str_glue_data(.x, ..., .sep = "", .envir = parent.frame(),
  .na = "NA")

Arguments

`...`	[`expressions`] Expressions string(s) to format, multiple inputs are concatenated together before formatting.
`.sep`	[`character(1)`: ‘""’] Separator used to separate elements.
`.envir`	[`environment`: `parent.frame()`] Environment to evaluate each expression in. Expressions are evaluated from left to right. If `.x` is an environment, the expressions are evaluated in that environment and `.envir` is ignored.
`.x`	[`listish`] An environment, list or data frame used to lookup values.
`.na`	[`character(1)`: ‘NA’] Value to replace NA values with. If `NULL` missing values are propagated, that is an `NA` result will cause `NA` output. Otherwise the value is replaced by the value of `.na`.

Examples

name <- "Fred"
age <- 50
anniversary <- as.Date("1991-10-12")
str_glue(
  "My name is {name}, ",
  "my age next year is {age + 1}, ",
  "and my anniversary is {format(anniversary, '%A, %B %d, %Y')}."
)

# single braces can be inserted by doubling them
str_glue("My name is {name}, not {{name}}.")

# You can also used named arguments
str_glue(
  "My name is {name}, ",
  "and my age next year is {age + 1}.",
  name = "Joe",
  age = 40
)

# `str_glue_data()` is useful in data pipelines
mtcars %>% str_glue_data("{rownames(.)} has {hp} hp")

stringr

Simple, Consistent Wrappers for Common String Operations

v1.4.0

GPL-2 | file LICENSE

Authors

Hadley Wickham [aut, cre, cph], RStudio [cph, fnd]

Initial release