Hey, I want to integrate the function below: (4*lambda*(1-z*z)) /( ((lambda+1)*(lambda+1) - (lambda-1)*(lambda-1)*z*z)*((lambda+1)*(lambda+1) - (lambda-1)*(lambda-1)*z*z)); I want to integrate over various z values, but plot as a function of lambda. I’m not sure how best to go about this. …

I changed the example code, to something of my own to understand exactly what is going on: double fsin(double *x, double *par){ double y = x[0]; double a = par[0]; return a*sin(y); } double Integral(double *x, double *par){ double a = x[0]; TF1 f("fsin", fsin, 0, 10, 1); //min, max, no.par…

Best way to integrate a function

ROOT

Wile_E_Coyote April 11, 2018, 2:00pm 7

What concerns “intergration”, see for example: