def gcv_error(y, ysmooth, peffective):
    gcv = np.mean((y - ysmooth) ** 2) / (1.0 - peffective / y.size) ** 2
    return gcv
For all the characters in the screen. Set the token to the given `token`.
dataset/ETHPy150Open brandonckelly/bck_stats/bck_stats/gcv_smoother.py/gcv_error--crossover with--dataset/ETHPy150Open jonathanslenders/python-prompt-toolkit/prompt_toolkit/layout/screen.py/Screen.replace_all_tokens