## Uses of Class
org.apache.sysds.runtime.compress.utils.ABitmap

- Packages that use ABitmap
  Package | Description
  --- | ---
  org.apache.sysds.runtime.compress.colgroup |
  org.apache.sysds.runtime.compress.colgroup.dictionary |
  org.apache.sysds.runtime.compress.estim |
  org.apache.sysds.runtime.compress.estim.sample |
  org.apache.sysds.runtime.compress.lib |
  org.apache.sysds.runtime.compress.utils |

- - ### Uses of ABitmap in org.apache.sysds.runtime.compress.colgroup

    Methods in org.apache.sysds.runtime.compress.colgroup with parameters of type ABitmap
    Modifier and Type | Method and Description
    --- | ---
    `static AColGroup` | ColGroupFactory.`compress(int[] colIndexes, int rlen, ABitmap ubm, AColGroup.CompressionType compType, CompressionSettings cs, MatrixBlock rawMatrixBlock, double tupleSparsity)` Method for compressing an ColGroup.

  - ### Uses of ABitmap in org.apache.sysds.runtime.compress.colgroup.dictionary

    Methods in org.apache.sysds.runtime.compress.colgroup.dictionary with parameters of type ABitmap
    Modifier and Type | Method and Description
    --- | ---
    `static ADictionary` | DictionaryFactory.`create(ABitmap ubm)`
    `static ADictionary` | DictionaryFactory.`create(ABitmap ubm, double sparsity)`
    `static ADictionary` | DictionaryFactory.`create(ABitmap ubm, double sparsity, boolean withZeroTuple)`
    `static ADictionary` | DictionaryFactory.`createWithAppendedZeroTuple(ABitmap ubm)`
    `static ADictionary` | DictionaryFactory.`createWithAppendedZeroTuple(ABitmap ubm, double sparsity)`
    `static ADictionary` | DictionaryFactory.`moveFrequentToLastDictionaryEntry(ADictionary dict, ABitmap ubm, int nRow, int largestIndex)`

  - ### Uses of ABitmap in org.apache.sysds.runtime.compress.estim

    Methods in org.apache.sysds.runtime.compress.estim with parameters of type ABitmap
    Modifier and Type | Method and Description
    --- | ---
    `EstimationFactors` | CompressedSizeEstimator.`estimateCompressedColGroupSize(ABitmap ubm, int[] colIndexes)` Method used to extract the CompressedSizeEstimationFactors from an constructed UncompressedBitmap.
    `static EstimationFactors` | CompressedSizeEstimator.`estimateCompressedColGroupSize(ABitmap ubm, int[] colIndexes, int nrRows, CompressionSettings cs)`

  - ### Uses of ABitmap in org.apache.sysds.runtime.compress.estim.sample

    Methods in org.apache.sysds.runtime.compress.estim.sample with parameters of type ABitmap
    Modifier and Type | Method and Description
    --- | ---
    `static int` | HassAndStokes.`haasAndStokes(ABitmap ubm, int nRows, int sampleSize, HashMap<Integer,Double> solveCache)` Haas, Peter J., and Lynne Stokes.

  - ### Uses of ABitmap in org.apache.sysds.runtime.compress.lib

    Methods in org.apache.sysds.runtime.compress.lib that return ABitmap
    Modifier and Type | Method and Description
    --- | ---
    `static ABitmap` | BitmapEncoder.`extractBitmap(int[] colIndices, int rows, BitSet rawBlock, CompressionSettings compSettings)`
    `static ABitmap` | BitmapEncoder.`extractBitmap(int[] colIndices, MatrixBlock rawBlock, boolean transposed)` Generate uncompressed bitmaps for a set of columns in an uncompressed matrix block.
    `static ABitmap` | BitmapLossyEncoder.`makeBitmapLossy(ABitmap ubm, int numRows)` Given a Bitmap try to make a lossy version of the same bitmap.

    Methods in org.apache.sysds.runtime.compress.lib with parameters of type ABitmap
    Modifier and Type | Method and Description
    --- | ---
    `static ABitmap` | BitmapLossyEncoder.`makeBitmapLossy(ABitmap ubm, int numRows)` Given a Bitmap try to make a lossy version of the same bitmap.

  - ### Uses of ABitmap in org.apache.sysds.runtime.compress.utils

    Subclasses of ABitmap in org.apache.sysds.runtime.compress.utils
    Modifier and Type | Class and Description
    --- | ---
    `class` | `Bitmap` Uncompressed representation of one or more columns in bitmap format.
    `class` | `BitmapLossy` Uncompressed but Quantized representation of contained data.
    `class` | `MultiColBitmap` Uncompressed representation of one or more columns in bitmap format.

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