## Uses of Class
org.apache.sysds.runtime.compress.readers.ReaderColumnSelection

- Packages that use ReaderColumnSelection
  Package | Description
  --- | ---
  org.apache.sysds.runtime.compress.readers |

- - ### Uses of ReaderColumnSelection in org.apache.sysds.runtime.compress.readers

    Subclasses of ReaderColumnSelection in org.apache.sysds.runtime.compress.readers
    Modifier and Type | Class and Description
    --- | ---
    `class` | `ReaderColumnSelectionBitSet`
    `class` | `ReaderColumnSelectionDenseMultiBlock`
    `class` | `ReaderColumnSelectionDenseMultiBlockTransposed`
    `class` | `ReaderColumnSelectionDenseSingleBlock`
    `class` | `ReaderColumnSelectionDenseSingleBlockTransposed`
    `class` | `ReaderColumnSelectionSparse` Used to extract the values at certain indexes from each row in a sparse matrix Keeps returning all-zeros arrays until reaching the last possible index.
    `class` | `ReaderColumnSelectionSparseTransposed` Used to extract the values at certain indexes from each row in a sparse matrix Keeps returning all-zeros arrays until reaching the last possible index.
    `class` | `ReaderCompressedSelection`

    Methods in org.apache.sysds.runtime.compress.readers that return ReaderColumnSelection
    Modifier and Type | Method and Description
    --- | ---
    `static ReaderColumnSelection` | ReaderColumnSelection.`createCompressedReader(CompressedMatrixBlock compBlock, int[] colIndices)`
    `static ReaderColumnSelection` | ReaderColumnSelection.`createReader(MatrixBlock rawBlock, int[] colIndices, boolean transposed)`

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