Integral from data file

Dear rootors,
I am trying to read data point from a file then integrate the values around function
data file have ( x and y), x start from 0 to 100 but with different step
and the function I want to integrate is
f=( x*y) dx
So I wrote this script“data.dat”);
while (!in.eof())

in >>x>>y;
**double f=x*y;
**double sum_f = sum_f+f;
cout<<"sum_f = "<<sum_f = <<endl;

may issue is I need to interpolate the values between x, because dx is not constant,
does anyone know the solution??

Please read tips for efficient and successful posting and posting code

ROOT Version: Not Provided
Platform: Not Provided
Compiler: Not Provided

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.