PACF and ACF only with part of the data

Course Name: Financial Time Series Analysis for Trading, Section No: 18, Unit No: 9, Unit type: Notebook

Hello,

In this notebook when we're plotting PACF and ACF to choose the best parameters for AR and MA, why do we plot PACF and ACF only with 70% of the data? In the previous sections we use the whole dataset to find best paramater. For example: Section 14 unit 3:

https://i.imgur.com/r6Rt0Ck.png

Is there any reason for this?

Look:

Hello Daniel,



Thank you for pointing this out. The notebook in section 14 has been updated.

Thanks!

Hello,



In the notebook Section 18, Unit 11 it's the same mistake. Please update it too, thanks!

Hello Daniel,



In this notebook, as before we are plotting the PACF and ACF on 70% of the data only. 



Thanks.