# PGFplots / TikZ input files

## Synthetic teaching fixtures (CC0)

`measurements.tsv` and `measurements.csv` contain the same nine invented time,
signal and plus/minus uncertainty records. The uncertainty values illustrate
plotting; they have no sampling-model interpretation. `missing.tsv` replaces
the signal at t=4 with `nan`. `intervals.tsv` contains invented x/y estimates
and separate lower/upper distances. `forest.tsv` contains group, estimate and
lower/upper interval distances; its intervals are supplied illustrative values.
`sample-values.tsv` is one fixed synthetic sample. `grid.tsv` contains five
columns and four rows of integer cell values, with x changing fastest.

All fixtures are invented for this tour and use CC0. They contain no person-level
or external archive data. Most figures use explicit functions or a handful of
coordinates instead of reading a table. Sample counts in an addplot expression
control curve resolution; they do not claim additional observations.

Run `python3 scripts/prepare-data.py --check` from the repository root to verify
checksums, the CSV/TSV equivalence and the grid structure. Input changes require
review of the data, fixture checksums and execution policy.