I was trying to scale TH2Poly histogram, but it didn’t work, and gave a warning
For my local needs I just implemented scale method in a TH2Poly class itself
void TH2Poly::Scale( double c1 )
for( int i = 0; i < this->GetNumberOfBins(); i++ )
but this is very uneducated way, and it doesnt take option*, also there might be potential
mistakes in this, that I don’t understand.
I just relay this info, you might want at some point implement this in TH2Poly.
You ask a question about “scale” but the error message you sent is about “Add”.
What you did to scale the bins looks ok … I just wondered if that makes sense when all the
bins might have a different shape…
To be checked with Lorenzo.
Thank you Couet for answer,
Yes it is a message about TH2Poly::Add(…), but
since in the scale method there is a call to Add, and also
looks like the addition is also not implemented, therefore
Scale was not working also.
//======From Reference guide===============
Bool_t TH2Poly::Add(const TH1 *, const TH1 *, Double_t, Double_t)
// Replace contents of this histogram by the addition of h1 and h2.
Warning("Add","Not implement for TH2Poly");
Depending on the particular task there might be a need for Scale,
particularly in my case I needed to scale it by a Luminosity to estimate rates
for a particular process.
Actually, which ROOT version are you using ? it seems that Add is implemented in 5.34:
root.cern.ch/root/html534/src/TH … tml#XdastB
My root version is also 5.34,
Yes, that particular method is implemented,
but there are 3 Add methods. Other two are not implemented according
to the documentation( lines 330 and 340) of the same link root.cern.ch/root/html534/src/TH … tml#XdastB.
Ok I just wanted to check we are speaking about the same version.
I will see if we can add “Scale”.