initializing TClonesArray (basic question)

From: George Locke <>
Date: Wed, 15 Nov 2006 13:14:39 -0500

More simple questions. I tried duplicating what i found in the online TClonesArray, and i looked in the user's guide, but my code still won't run properly :( so i tried and RTFM...

(root 5.13.04, windows 2000, compiliing with msvc 8)

all i want is 8 identical histograms to fill and reference in an array.


        TClonesArray bigArr("TH1F", 8);         

	for (chan=0; chan<NUM_CHAN; chan++) {
		new(bigArr[chan]) TH1F(name,title,HIST_SIZE,0,HIST_SIZE);
		printf("\t after%d\n\n",chan);

	[fill histograms, read histograms, write histograms]


this will compile but when i run it i am told "Warning in <th1::Build>: Replacing existing histogram: XX (potential memory leak)"
this error doesn't occur the first time, but after 0,1,2,3,4,5,6 it occurs each time.

the program doesn't crash, but when I try to fill the histograms with a simple parabolic pattern, every getbincontent(x) returns 0.

When i try to write either the bigArr[x] or just bigArr nothing gets into the file that i try to write to (eg i open in Cint and do and it shows an empty file).

I tried making the new commands not inside of a block (that is, i wrote in chan=0 new().... with no loop) to see if that would change anything and it didn't.

I must be initializing things wrong.

Thanks Again,
George Received on Wed Nov 15 2006 - 19:14:50 MET

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