Class AColGroupCompressed

    • Method Detail

      • sameIndexStructure

        public abstract boolean sameIndexStructure​(AColGroupCompressed that)
      • getMin

        public double getMin()
        Description copied from class: AColGroup
        Short hand method for getting minimum value contained in this column group.
        Specified by:
        getMin in class AColGroup
        Returns:
        The minimum value contained in this ColumnGroup
      • getMax

        public double getMax()
        Description copied from class: AColGroup
        Short hand method for getting maximum value contained in this column group.
        Specified by:
        getMax in class AColGroup
        Returns:
        The maximum value contained in this ColumnGroup
      • getSum

        public double getSum​(int nRows)
        Description copied from class: AColGroup
        Short hand method for getting the sum of this column group
        Specified by:
        getSum in class AColGroup
        Parameters:
        nRows - The number of rows in the column group
        Returns:
        The sum of this column group
      • unaryAggregateOperations

        public final void unaryAggregateOperations​(AggregateUnaryOperator op,
                                                   double[] c,
                                                   int nRows,
                                                   int rl,
                                                   int ru)
        Description copied from class: AColGroup
        Unary Aggregate operator, since aggregate operators require new object output, the output becomes an uncompressed matrix. The range of rl to ru only applies to row aggregates. (ReduceCol)
        Specified by:
        unaryAggregateOperations in class AColGroup
        Parameters:
        op - The operator used
        c - The output matrix block
        nRows - The total number of rows in the Column Group
        rl - The starting row to do aggregation from
        ru - The last row to do aggregation to (not included)
      • unaryAggregateOperations

        public final void unaryAggregateOperations​(AggregateUnaryOperator op,
                                                   double[] c,
                                                   int nRows,
                                                   int rl,
                                                   int ru,
                                                   double[] preAgg)
      • tsmm

        public final void tsmm​(MatrixBlock ret,
                               int nRows)
        Description copied from class: AColGroup
        Do a transposed self matrix multiplication on the left side t(x) %*% x. but only with this column group. This gives better performance since there is no need to iterate through all the rows of the matrix, but the execution can be limited to its number of distinct values. Note it only calculate the upper triangle
        Specified by:
        tsmm in class AColGroup
        Parameters:
        ret - The return matrix block [numColumns x numColumns]
        nRows - The number of rows in the column group
      • isEmpty

        public boolean isEmpty()
        Description copied from class: AColGroup
        Get if the group is only containing zero
        Specified by:
        isEmpty in class AColGroup
        Returns:
        true if empty