nirs4all.analysis.playground_metrics module

Historical Playground descriptors owned by the scientific library.

These are per-spectrum exploration descriptors, not predictive-model scores. The 0.9.1 definitions are retained; missing results and cleaning conventions are reported explicitly. Chemometric calculations delegate to existing filters.

nirs4all.analysis.playground_metrics.descriptor_statistics(values: ndarray) → dict[str, Any]

Historical nan-excluding summary with explicit observation counts.