getVariables: Get the names of the variables used in code

Description

These functions and methods allow one to get the names of the variables used within a script or block of code and from various derived types.

Usage

getVariables(x, inputs = FALSE, functions = TRUE, ...)

Value

A character vector, with possibly repeated values, giving the names of the variables. If an annotated script was used, the vector is named by the sections of the script.

Arguments

x: the object with information about the variables
inputs: a logical indicating wether to include the input variables or just return the output variables, i.e. those on the left hand side of of an assignment. Defaults to FALSE
functions: Indicates what types of functions should be included. NULL Logical or NULL. Indicages what kind of functions should be counted as variables: local (TRUE, the default)(default) indicates none, TRUE indicates user-defined or unknown provenance functions, and FALSE indicates all functions. Ignored if inputs is FALSE.
...: Passed to getInputs when generating script information to comput on.

Author

Duncan Temple Lang

Examples

Run this code

 f = system.file("samples", "namedAnnotatedScript.R", package = "CodeDepends")
 sc = readScript(f, "labeled")
 getVariables(sc)

 getVariables(sc[[3]])

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