'numpy.ndarray' object has no attribute 'plot' while forecasting

Question

I'm trying to forecast with SARIMA model but it keeps showing

'numpy.ndarray' object has no attribute 'plot'

Does anyone know how to solve it?

ax = monthly_mean['2016':].plot(label='observed')
predictions.predicted_mean.plot(ax=ax, label='One-step ahead Forecast', alpha=.7)
ax.fill_between(pred_ci.index,
 pred_ci.iloc[:, 0],
 pred_ci.iloc[:, 1], color='k', alpha=.2)
ax.set_xlabel('Date')
ax.set_ylabel('CO2 Levels')
plt.legend()
plt.show()

• user17242583: You need to plot a dataframe, not a numpy array.
• hpaulj: Apparently predictions.predicted_mean is an array. Array can be passed as an argument to plt.plot. It does not have a plot method. What made you think that was possible?
• BsAxUbx5KoQDEpCAqSffwGy554PSah: Does this answer your question? Prob using axes for subplot an get AttributeError: 'numpy.ndarray' object has no attribute 'plot'