Why does my new data with length of 12, give me 48 posterior predictive observations?

[OriolAbril]

@jordan.howell2

    promo_ = pm.MutableData('promo', promo)
    t_ = pm.MutableData('t', t)
    a_ = pm.MutableData('a', a)
    s_ = pm.MutableData('s', s)

You define these variables here but then don’t use them in the model. When you use pm.set_data those are the variables being modified, but modifying them has no effect on the model because the model uses the numpy/pandas objects directly.