[Dune] PSI Summer Student Dune Question

[Aleksejs Fomins]

Dear Sirs,

I am a summer student working at PSI.
I am working on a project Hades with Dr. Benedikt Oswald.
My task at the moment is implementing base functions.

Could you please suggest a way to declare a constant FieldVector using 3 
given coordinates in Dune.
If it was just an array, I would have written something like
const double myVector[3] = {myXcoordinate, myYcoordinate, myZcoordinate};

Kind regards,
Aleksejs Fomins