#include <columns_info.h>

Concept definition

template<class R>
concept ultra::src::DataframeMatrix = 
  std::ranges::forward_range<R>
  && std::ranges::sized_range<R>
  && DataframeRow<std::ranges::range_value_t<R>>

Detailed Description

A collection of dataframe rows.

A DataframeMatrix represents a full tabular dataset. It must:

be a forward_range and sized_range;
have elements that satisfy DataframeRow.

The outer range corresponds to rows, while the inner range corresponds to columns within each row.