Changing animator controller in script

Is it possible to change the animator controller that an animator uses in a script? i want to run a different set of animations in certain situations or do i have to put it all in one animator controller and use variables there?

 

Code (csharp):

1.  
2.        anim = GetComponent<Animator>();
3. anim.runtimeAnimatorController = someController;
4.  

 

Thanks!