I don’t think this is the better place for discussing this, I guess that poping that question in the google group for this toolkit would be better:

http://groups.google.com/group/javascript-information-visualization-toolkit

I’ll try to answer to the question:

“How to pass this object to the file static1-rgraph.js, so as it will assume the value of var D in function init()?”

This is done by making an Ajax call to get the json result from your file.
In order to execute your php file and be able to make an Ajax call from the client (say from the init function) to the service exposed by your php file you need something like a server (apache, etc).
Once you placed your file server side then in the init function you can make an ajax call like this (I’m assuming you’re using MooTools):

//canvas and rgraph initialization code...
var canvas = new Canvas(/* ... */);
var rgraph = new RGraph(/* ... */);

var jsonRequest = new Request.JSON({
  url: "http://site.com/yourphpfile.php", 

  onComplete: function(json){
    rgraph.loadTreeFromJSON(json);
    rgraph.compute();
    rgraph.plot();
}}).get({'someparametername': 'someparametervalue'});

If you want to know more about the MooTools request object check it out here:

http://mootools.net/docs/core/Request/Request.JSON

I’m sorry but I can’t package any examples having server side interaction because I’d need to package a standalone server with the library, and it seems kind of overkill.

If you have further questions please send them to the google group for this library (I putted the link to it above).

Regards,

$json = new Services_JSON();
$resposta = $json->encode($dados);

The Question is: How to pass this object to the file static1-rgraph.js, so as it will assume the value of var D in function init()?

Also
Do you have any other implementation where the data results from a consult in a data base (data bank or text file)?
Congratulations for your very interesting work.
Kind regards,
Debora

Thank you for excellent toolkit.

Nitin