R: A version of substitute that works in the global environment.

subs {pryr} | R Documentation

## A version of substitute that works in the global environment.

### Description

This version of `substitute` is more suited for interactive exploration because it will perform substitution in the global environment: the regular version has a special case for the global environment where it effectively works like `quote`

### Usage

    subs(x, env = parent.frame())

### Arguments

`x` | a quoted call
`env` | an environment, or something that behaves like an environment (like a list or data frame), or a reference to an environment (like a positive integer or name, see `as.environment` for more details)

### Substitution rules

Formally, substitution takes place by examining each name in the expression. If the name refers to:

- an ordinary variable, it's replaced by the value of the variable.

- a promise, it's replaced by the expression associated with the promise.

- `...`, it's replaced by the contents of `...`

### Examples

    a <- 1
    b <- 2

    substitute(a + b)
    subs(a + b)

[Package pryr version 0.1.2 Index]