Maps relationships among measurements using a double-centered,
joint-entropy-normalized mutual information matrix. Provides informational-axis
loadings, primary and extended spectral-boundary diagnostics, and spectral-volume
and informational-gravity summaries for discrete and discretized tabular data.
The selected Primary Informational Rank is a candidate information-spectrum
boundary, not an identified generating dimension. Optional, explicitly
recorded missing-data preparation supports categorical missing states and
numeric median fills with protected missingness indicators.
For methodological details, see Lee-St. John (2026)