[CppAD] CPPAD store derivative function

[MANUSHANKER BALASUBRAMANIAN]

Dear All,

I am using CPPAD library to compute gradient of a function. Given a function f(y,z,r1,r2,r3,r4) I would like to first obtain two new functions fy and fz which are derivatives of f with respect to y and z, then subsequently obtain derivatives of fy and fz with respect to other parameters. Can you please let me know if it possible to obtain a ADFun of a derivative. 

Regards,

Manu