# Accessing Tape

I am trying to access the tape so that I can create error indicators. However I am having trouble, because in the tape there are iterations and timesteps. How can I access just the last iteration of a timestep? In the following code snippet I compute the adjoint and then look for the corresponding adjoint solution. Once I have the adjoint solution I try to use it and the tape value to create my error indicators, but as I stated some of the vars in compute_adjoint are for an iteration. This makes it difficult for me to just step through and assume what I have corresponds to a timestep rather than an iteration for a timestep.

i = int(math.ceil(T/k)) - 1 #last time step

adjoint = compute_

for (phi, var) in adjoint: #step through the adjoint solution

if var.name == 'w':

# Compute error indicators ei

LR1 = k*self.

i -= 1 #decrease the timestep

## Question information

- Language:
- English Edit question

- Status:
- Solved

- Assignee:
- No assignee Edit question

- Solved by:
- lvleph

- Solved:

- Last query:

- Last reply: