makeGraph: Create a graph describing the relationships between variables...
In CodeDepends: Analysis of R Code for Reproducible Research and Code Comprehension

Description Usage Arguments Details Value Author(s) See Also Examples

This creates a graph of nodes and edges describing the relationship of how some variables are used in defining others.

1 2	makeVariableGraph(doc, frags = readScript(doc), info = getInputs(frags), vars = getVariables(info, inputs = free), free = TRUE)

`doc`	the name of the script file
`frags`	the code fragments from the script as a `Script` object.
`info`	the `ScriptInfo` list of `ScriptNodeInfo` objects describing each node.
`vars`	a character vector giving the names of the variables in the scripts. By default, these are the variables defined in the script.
`free`	a logical value that is passed to `getInputs` and controls whether we include the free/global variables in the script.

Note that this collapses variables with the same name into a single node. Therefore, if the code uses the same name for two unrelated variables, there may be some confusion.

An object of class graphNEL from the graph package.

Duncan Temple Lang

readScript getInputs getVariables

graph Rgraphviz

## Not run: 
 u = url("http://www.omegahat.net/CodeDepends/formula.R")
 sc = readScript(u)
 close(u)
 g = makeVariableGraph(, sc)

## End(Not run)

 f = system.file("samples", "results-multi.R", package = "CodeDepends")
 sc = readScript(f)
 g = makeVariableGraph( info = getInputs(sc))
 if(require(Rgraphviz))
   plot(g)