I have a two dimensional histogram that I create using the ratio funtion (using 2 2D hists as arguments). The values in the 2D ratio hist are always < or =1 (they are efficiencies). I then get a ID profile by doing:
TH1D * proj_1 = h_Ratio1->ProjectionY(“proj_1”, 1,max," ");
This gives me the right shape but the values on the Y axis are no longer less than 1, it seems that the projection funtion is summing all the values in my bins 1 to max but not then dividing by the number of bins. Is this a bug? How can I get a 1D projection of a 2D hist and it gives me the average values of the bins rather than the totals?