Create a schedule with constant learning rate `start_lr` for `pct` proportion of the training, and a `curve_type` learning rate (till `end_lr`) for remaining portion of training.
combined_flat_anneal(pct, start_lr, end_lr = 0, curve_type = "linear")Proportion of training with a constant learning rate.
Desired starting learning rate, used for beginnning pct of training.
Desired end learning rate, training will conclude at this learning rate.
Curve type for learning rate annealing. Options are 'linear', 'cosine', and 'exponential'.