Package org.apache.sysds.runtime.compress.colgroup

Class ASDC

  • All Implemented Interfaces:
    Serializable, AOffsetsGroup
    Direct Known Subclasses:
    ColGroupSDC, ColGroupSDCFOR, ColGroupSDCSingle
    public abstract class ASDC
extends AMorphingMMColGroup
implements AOffsetsGroup
    Column group that sparsely encodes the dictionary values. The idea is that all values is encoded with indexes except the most common one. the most common one can be inferred by not being included in the indexes. This column group is handy in cases where sparse unsafe operations is executed on very sparse columns. Then the zeros would be materialized in the group without any overhead.
    See Also:
    Serialized Form

    • Method Detail

      • getNumRows

        public int getNumRows()

      • getDefaultTuple

        public abstract double[] getDefaultTuple()