Module dataframe 

DataFrame: ordered, named columns sharing a single row index.

Structs

ComputedMeta

Metadata for a materialized (cached) directive column: the directive that produced it, its lookback, and how many leading rows currently hold valid values. After an append, the new rows are stale (NaN) and valid_rows lags height until fulfill recomputes the tail.

DataFrame

A 2-D, column-oriented, time-indexed table. All columns share one index and have equal length (height).