Per-column histogram: NUM_BINS counts over [min[i], max[i]], raw space.
Per-column Infinity count.
Per-column maximum (excluding NaN/Inf).
Per-column arithmetic mean.
Per-column approximate median (from the fine histogram; error ~(max-min)/1024).
Per-column minimum (excluding NaN/Inf).
Per-column NaN count.
Per-column population standard deviation.
A LOD's measurements in columnar (struct-of-arrays) form: every field is an array index-aligned with the owning LodStats's
columns.