The following task needed to be solved.
We have a function with two variables, for example
z(x,y)=x * x * y;
We calculate the the partial derivative of z with respect to the variable x, for example at the point x=1. Then we get a function with the y variable which is in our case f(y)=2*y.
How this algorithm can be performed by ROOT to draw f(y)?
Thank you in advance for any help you can provide!