ar1_processes#

  • Series: lecture-python-intro

  • File: lectures/ar1_processes.md

  • Audit date: 2026-05-28

  • Categories audited: writing, math, code, figures, references, links, admonitions (JAX out of scope)

  • Overall score: 7.9 / 10

  • Priority: LOW

Score breakdown#

Category

Score

One-line note

Writing

9/10

H1 Title Case OK; H2/H3 sentence case; clean one-sentence paragraphs.

Math

7/10

Sequences \{X_t\} OK; “iid” used (W6 violation) in one place; uses \mathbb E for expectation.

Code

8/10

Unicode Greek used in code (α, β, etc.); plt.rcParams["figure.figsize"] set globally (line 46).

JAX

out of scope

—

Figures

7/10

Global plt.rcParams["figure.figsize"] override (line 46); no :name: on figures; no ax.set_title violations outside exercises.

References

7/10

{cite} used; line 335 “textbook by {cite}`MeynTweedie2009`” is in-text and should be {cite:t}.

Links

N/A

no external cross-series links

Admonitions

9/10

{prf:example} used (qe-admon-004 OK); solutions use :class: dropdown and exercise labels (qe-admon-002, qe-admon-005 OK).

Issues#

Critical#

None found.

High severity#

None found.

Medium severity#

  • W6 — “iid” written lowercase on line 563 in an exercise; “IID” used correctly elsewhere (line 83). Count: 1 inconsistency.

  • [qe-ref-001] — In-text citation should use {cite:t} not {cite}. Example: lectures/ar1_processes.md:335 (“The textbook by {cite}`MeynTweedie2009`”). Count: 1 occurrence.

Low severity#

  • W1 — A few two-sentence paragraphs.

  • W7 — \psi_t label inside string with leading $\psi_t$ — fine.

  • [qe-fig-001] — Sets plt.rcParams["figure.figsize"] = (11, 5) globally (line 46) — overrides _config.yml defaults.

  • [qe-fig-005] — No figures use the {figure} directive with :name: for cross-referencing.

Strengths#

  • Sequences use \{X_t\} (M6 OK).

  • \mathbb E for expectation (M7 OK).

  • Distribution name N(\mu, \sigma^2) plain (M9 OK).

  • Equation labels with {math} :label: (M14 OK).

  • Bold for definitions (AR(1) model, stochastic difference equation).

  • Unicode Greek letters used in code (qe-code-002 OK).

  • Solutions use :class: dropdown and reference their exercise labels (qe-admon-002, qe-admon-005 OK).