Interpreting the regressor coefficients

Now let's look at how to inspect the effects of these additional regressors. Prophet includes a package called utilities, which has a function that will come in handy here, called regressor_coefficients. Let's import it now:

from fbprophet.utilities import regressor_coefficients

Using it is straightforward. Just pass the model as an argument and it will output a DataFrame with some helpful information about the extra regressors included in the model:

regressor_coefficients(model)

Let's take a look at this DataFrame:

Figure 8.6 – The regressor coefficients DataFrame

It features a row for each extra regressor in your model. In this case, we have one for temperature and three more for the weather conditions we included. The regressor_mode column naturally will have strings of either additive or multiplicative, depending upon the effect of each specific regressor on 'y'. The mean...