About TF2 Integral

[moneta]

Hi,
There exists many example for this. A recent and simple one is this:

Help with TF2 integral

So, I’ve tried some functions. For instance, first I tried to compute Int_0^2 dx Int_0^2 dy x*y using this code: double func2(const double *x){ return x[0]*x[1]; } void integral(){ ROOT::Math::Functor f2(& func2, 2); double a[2] = {0,2}; double b[2] = {1,2}; ROOT::Math::IntegratorMultiDim ig1(ROOT::Math::IntegrationMultiDim::kADAPTIVE); ig1.SetFunction(f2); double val = ig1.Integral(a,b); cout<<val<<endl; } It worked. Them, I tried to change the y integration limits to Blockquote…