references to histos

From: Maurizio Ungaro (ungaro@maurizio.phys.rpi.edu)
Date: Mon Feb 14 2000 - 17:34:28 MET


Hi all,
I'm using the command (thanks to giving us that)

 cross[i]->ProjectionX(proj_th[i],j,j+1,"E")

to project a 2D histos (cross) in to slices.
where proj_th[i] is a string.

Now, how can I refer to proj_th[i] ?

If I tried 

	proj_th[i]->Draw() 

of course doesn't work.

I tried

pr[i]=new TH1D(proj_th[iQ2],"Cross section cos(theta*)",10,-1,1);

before the projection, i.e. before

 cross[i]->ProjectionX(proj_th[i],j,j+1,"E")

but then the histo pr[i]
is empty.

Suggestion on what I'm doing wrong?

Maurizio



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