Column

Column = Float64Array | Int32Array | Value[]

Defined in: packages/model-dataset/src/frame/column.ts:19

One field’s values, in row order.

A typed array is the canonical form for a complete, null-free numeric field: it stores eight bytes per value with no boxing, which a boxed array cannot do because it is heterogeneous by definition. A field that is still filling in, or that has gaps, uses the boxed form; DataFrameBuilder chooses.