Sliding graph

From: Emanuel Machado <Emanuel-Machado_at_cytonome.com>
Date: Fri, 14 Dec 2007 22:10:18 -0500

Hi,

We're trying to use a graph-like display that accumulates data all the time but after a certain number of points it starts to dump the old ones. Something like

	TGraph *p = new TGraph(n, x, y)
	x = ...
	y = ...
	p->Draw()
	
	Int i = 0;
	While (1) {
		// my hardware acquisition
		AcquirePoint (i &yp)

		// place point in graph
		if (i <n) {
			p->SetPoint(i,yp);
		} else {
			// remove first point
			p->RemovePoint(0);
			// insert point at the end
			p->InsertPoint(n-1,yp);
		}			
		P->Modified();
		p->Update();
	}

Unfortunately, of course, this does not work since InsertPoint is meant for mouse access. Is there a way (perhaps more obvious) to achieve this effect?

Many thanks,

Emanuel

---

Emanuel Machado, PhD.
Senior Engineer, Project Leader    

Cytonome, Inc.
27 Drydock Ave
Boston, MA 02210
Voice: (617) 330-5030 ext. 237
Fax: (617) 330-5031
Website: www.cytonome.com  

Email: Emanuel-Machado_at_cytonome.com  

> -----Original Message-----
> From: owner-roottalk_at_root.cern.ch [mailto:owner-roottalk_at_root.cern.ch] On
> Behalf Of Rene Brun
> Sent: Friday, December 14, 2007 4:47 AM
> To: roottalk; project-lcg-peb-apps_at_cern.ch; project-lcg-af_at_cern.ch
> Subject: [ROOT] Pre-Production release 5.17/08 is now available
>
> The pre-production release of ROOT 5.17/08 is now available.
> This will be the last development version for 5.17. We release it before
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> Between now and the production release in January, no new developments
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> Rene Brun, on behalf of the ROOT team
Received on Sat Dec 15 2007 - 04:08:32 CET