for the homework, we are given:

    TH1F *h1 = new TH1F("h1", "h1", 200, -5,5);
    TF1 *f1 = new TF1("f1", "[2]*TMath::Gaus(x,[0],[1])");
    f1->SetParameters(1,1,1);
    h1->FillRandom("f1");
    h1->Draw()

Try typing into google "TMath root" to find an expression for a poisson fit, rather than Gaus()..

Hope This Helps!!=D

-Ashley

For Windows users, if there are any problems dealing with ROOT, I recommand you to go back to root.cern.ch, and download it again. When you are done downloading, click “repair”. Then, it will fix the problem. (hopefully)

Hope that helps, =D

Does anyone with Windows know how to fix this? It is making homework assignments incredibly difficult, having to type everything in.
-Chelsea

When I run “TBrowser b”, it opens up TRootBrowserLite and gives me this message:

“You are using the old ROOT browser! A new version is available. To use it:
Select the ‘New Browser’ entry from the ‘File’ menu in the browser, or change
‘Browser.Name:’ from ‘TRootBrowserLite’ to ‘TRootBrowser’ in system.rootrc”

However, I changed “TRootBrowserLite” to “TRootBrowser”, but I then had a Break-gdb not found type of error. Anybody know what’s up with this?

Thanks,

Michael

I was running the standard checks that Arno gave us to make sure everything is up and running on my computer. I discovered that I couldn’t run “xterm” while connected to lxplus.cern.ch I received the error “xterm Xt error: Can’t open display:”

Thanks to some help from Elim, I found out I was connected via “ssh user@lxplus.cern.ch” whereas I needed to be connected to “ssh -X user@lxplus.cern.ch”. Sure enough, I connected to ssh -X and was able to run “xterm” without a problem.

If you’re having problems with running “xterm”, try this out and see if it works.

Michael

To check if your ROOT installation is OK you could type into the ROOT window the following:

TBrowser b;

If an additional window would open up most likely all is OK.

Arno

For all Mac users,

Take a moment to check out the Cyberduck application at http://cyberduck.ch/ to make things a little more convenient with server connections and directories.

It is also recommended that you use this in conjunction with Aquamacs at http://aquamacs.org/.

Michael