Hello, I have a problem to weight my histogram with function. I work with ROOT 23/11 and KCC. My function is third polynomial function with four parameters. A0 : 0.8409, A1 : 0.5085, A2 : 0.1611, A3 : -383.4 Also I use several cut definitions : TCut EVNT = "(nsgl<1)&&(nsgl==1)" ; TCut CMUP = "(sgltyp1==20)&&(detcmuo==3)" ; My first question is whether this is possible in present ROOT version or not. If this is possible, how? My histogram is filled from ntuple and pt is one of variables of my ntuple. I hoped next line worked, but it's not. I can feel this is wrong, but actually I don't know how to fix. h400->Draw("taupt>>histogram", "(0.8409+0.5085/pt+0.1611/(pt)**2-383.4/(pt)**3)"*(EVNT&&CMUP),"goff"); Can you give me some advice? Thanks in advance. Min Jeong ================================ Min Jeong Kim (CDF/KHCL) E-mail : mjkim@fnal.gov Office : CDF 137-B (X8473) ================================
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