Computational companion

Read the method.
Run the example.

• Chapter scriptsR and Python files organised by chapter, mirroring the printed code boxes.
• WorkbooksRunnable workbooks for reproducing the worked examples end to end.
• DatasetsThe data behind the examples, ready to load in either language.
• QR targetsEach printed QR code opens a small, box-level source file, with the human-readable link beside it.

fit <- lm(price ~ living_area + monthly_fee,
          data = apartments)

fit = smf.ols(
  "price ~ living_area + monthly_fee",
  data=apartments
).fit()