Check slides

[robjhyndman]

Please go through slides to check for errors, especially in R code.

[mitchelloharawild]

Some thoughts:

• [x] Introduce facet_calendar() instead of frame_calendar().
• [x] gather()/spread() should become pivot_*() variants.
• [x] Gradually introduce inflation adjustment code - a full page of code can be daunting.
• [x] Potentially generalise transformation section beyond box_cox(). Perhaps logp1() is worth a mention?
• [x] Better to use features() with ljung_box() - that way it works for many series/models and gives a tibble in return.
• [x] lab session 18 requests piecewise linear trend, of which I do not recall being introduced yet.
• [x] reduce pdf size and loading times by using raster images.

[mitchelloharawild]

Checked, slides and labs run fine. Will need fabletools 0.1.2 for fixes to features().