Gradient of a function in C++

[Hoomaan Moradi]

Hello All,

Does anybody know how we can convert DM to double in C++?

Additionally, How can we compute the gradient of a CasADi function and obtain its value at a certain point in C++?

Thank you in advance

[Joel Andersson]

Hi,

If the "DM" is a scalar (i.e. a 1-by-1 matrix), you can simply use assignment (there is a conversion operator defined):

  DM aaa = 3.2; // double to casadi::DM

  double a = aaa; // casadi::DM to double

For your second question, please reread the user guide. You have to create a function object corresponding to the gradient and then evaluate it numerically.

Joel