ROL: Access the updated x values for each iteration in the optimization process

[ofmla]

Question

@trilinos/rol @dridzal I would like to plot convergence curves, such as ||x_computed - x_true||/||x_true||, in addition to the objective/loss function curves. However, I couldn’t find an example of how to achieve this in ROL.

Problem Description
How can I obtain this information when using ROL?

Example Use Case
Consider a simple 2D Rosenbrock problem. I want to use ROL to minimize the objective function and plot the convergence ||x_computed - x_true||/||x_true|| over iterations.

Request for Help
Can someone provide an example code snippet or guidance on how to achieve this in ROL?

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