[BioC] Rgraphviz: how to read a \"dot\" file?

[Martin Morgan]

On 10/15/2012 01:36 PM, Vincent Carey wrote:
> try agread()
>
> probably needs more doc

I added some to the devel version of Rgraphviz, including:

Read / write Ragraph objects

Description:

      These functions will write an 'Ragraph' object to or from a file.

Usage:

      agwrite(graph, filename)
      agread(filename, layoutType="dot", layout=TRUE)

Arguments:

    graph: An object of class 'Ragraph'

filename: The input or output filename

layoutType: character(1) specifying the format of the input file. Must
           be one of 'graphvizCapabilities()$layoutTypes'.

   layout: logical(1) indicating whether 'graphLayout' is to be called
           on the result of file input.

Details:

      These function are wrappers to agwrite() and agread() calls in
      Graphviz.

Author(s):

      Jeff Gentry

See Also:

      'agopen', 'agread'

Examples:

      V <- letters[1:10]
      M <- 1:4
      g1 <- randomGraph(V, M, .2)
      z <- agopen(g1, "foo", layout=FALSE) ## default layoutType 'dot'
      file <- tempfile()
      agwrite(z, file)


      ## supported input types
      graphvizCapabilities()$layoutTypes
      g2 <- agread(file, layout=TRUE)
      if (interactive())
         plot(g2)

>
> On Mon, Oct 15, 2012 at 4:16 PM, Sam [guest] <guest at bioconductor.org> wrote:
>
>>
>> The Rgraphviz package index says nothing about reading "dot" files.
>> (it has "toFile" to write them but no fromFile).
>> How do I create an Ragraph object?
>> (either by reading a dot file or from a list of edges with weights and
>> vertices with names and other attributes).
>>
>>
>>   -- output of sessionInfo():
>>
>>
>> Thanks!
>>
>> --
>> Sent via the guest posting facility at bioconductor.org.
>>
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