expr_label | R Documentation |
expr_find()
finds the full expression; expr_text()
turns the
expression into a single string; expr_label()
formats it nicely for
use in messages. expr_env()
finds the environment associated with
the expression.
expr_label(x) expr_text(x, width = 60L, nlines = Inf) expr_find(x) expr_env(x, default_env)
x |
A promise (function argument) |
width |
Width of each line |
nlines |
Maximum number of lines to extract. |
default_env |
If supplied, |
These functions never force promises, and will work even if a promise has previously been forced.
# Unlike substitute(), expr_find() finds the original expression f <- function(x) g(x) g <- function(y) h(y) h <- function(z) list(substitute(z), expr_find(z)) f(1 + 2 + 3) expr_label(10) # Names a quoted with `` expr_label(x) # Strings are encoded expr_label("a\nb") # Expressions are captured expr_label(a + b + c) # Long expressions are collapsed expr_label(foo({ 1 + 2 print(x) }))
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.