Get all floting number v2

[Wile_E_Coyote]

TF1 GetParameter : accuracy is limited

[code]// … #include #include // … std::cout << std::setprecision(17) << "Parameter(2) is " << fitFcn->GetParameter(2) << std::endl; std::cout << std::setprecision(7) << "Parameter(2) is " << fitFcn->GetParameter(2) << std::endl; // …[/code]

ROOT rounds to Integers

root [0] std::cout << 10./3. << std::endl; 3.33333 root [1] std::cout.precision(16); root [2] std::cout << 10./3. << std::endl; 3.333333333333333 root [3] std::cout << std::setprecision(10) << 10./3. << std::endl; 3.333333333 See the std::ios_base::precision and std::setprecision descriptions.