# Package org.apache.sysds.runtime.compress.estim.encoding

- Interface Summary
  Interface | Description
  --- | ---
  IEncode | This interface covers an intermediate encoding for the samples to improve the efficiency of the joining of sample column groups.

- Class Summary
  Class | Description
  --- | ---
  ConstEncoding | Const encoding for cases where the entire group of columns is the same value
  DenseEncoding |
  EmptyEncoding | Empty encoding for cases where the entire group of columns is zero
  SparseEncoding | Most common is zero encoding