TReeFormulae and GetNdata

From: Tim Head <betatim_at_gmail.com>
Date: Mon, 19 Oct 2009 10:46:03 -0500


Hello,

I am curious why uncommenting line 33 in the attached script makes the tree formula work as expected.

Notice that in event 2 njet is three and that jetfoo[2]/njet should come out as 2.17 but the formula calculates 0.

>From the brief documentation on GetNdata() I expected that all it does
is tell me how many instances are available. It seems to have some other side effect though.

What is the right way to get a formula to play nice? It seems like a hack to call GetNdata() just to get it to work.

I have root 5.20 on linux.

Tim

-- 
http://tim.jottit.com/

Received on Mon Oct 19 2009 - 17:46:13 CEST

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