ColumnsByIdx / Select Layer

Select columns by their position indices (0-based). Similar to pandas iloc[] or R's select() with numeric indices. Useful for:

  • Maintaining specific column orders
  • Selecting columns by position
  • Working with known dataset structures
  • Automated column selection patterns
  • Fixed-format data processing
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Indices

[u32, ...]

Zero-based indices of columns to select. Examples:

  • [0, 1, 2] selects first three columns
  • [1, 3, 5] selects second, fourth, and sixth columns

Invalid indices will cause an error