[u,v,p] is a vectorial FE object. I contains all the degrees of freedom. You cannot access it like that. The structure is illustrated by the following:
[u,v,p] = [1,2,3];
for [i, ui : u[]] cout << "i=" << i << ", u[i]=" << ui << endl;
[u,v,p] is a vectorial FE object. I contains all the degrees of freedom. You cannot access it like that. The structure is illustrated by the following:
[u,v,p] = [1,2,3];
for [i, ui : u[]] cout << "i=" << i << ", u[i]=" << ui << endl;