Vectors

To write your own vector class, simply inherit from ROL.CustomLA.

PyROL provides a ROL.StdVector class, which is based on the ROL::StdVector class. Using it is as simple as

import ROL
x = ROL.StdVector(2)
x[0] = 1.0
x[1] = 2.0
print x.norm()

However, you are likely to want to implement your own vector class, for example based on the data storage of a finite element library. This class is then able to implement a custom inner product, for example an \(L^2\) inner product.

TODO: document one of the CustomLA classes and somehow include them here.