Class AColGroupValue

    • Method Detail

      • getNumValues

        public int getNumValues()
        Description copied from class: AColGroup
        Obtain number of distinct tuples in contained sets of values associated with this column group. If the column group is uncompressed the number or rows is returned.
        Specified by:
        getNumValues in class AColGroup
        Returns:
        the number of distinct sets of values associated with the bitmaps in this column group
      • getCounts

        public final int[] getCounts()
        Returns the counts of values inside the dictionary. If already calculated it will return the previous counts. This produce an overhead in cases where the count is calculated, but the overhead will be limited to number of distinct tuples in the dictionary. The returned counts always contains the number of zero tuples as well if there are some contained, even if they are not materialized.
        Returns:
        The count of each value in the MatrixBlock.
      • computeColSums

        public void computeColSums​(double[] c,
                                   int nRows)
        Description copied from class: AColGroup
        Compute the column sum
        Specified by:
        computeColSums in class AColGroup
        Parameters:
        c - The array to add the column sum to.
        nRows - The number of rows in the column group.
      • getNumberNonZeros

        public long getNumberNonZeros​(int nRows)
        Description copied from class: AColGroup
        Get the number of nonZeros contained in this column group.
        Specified by:
        getNumberNonZeros in class AColGroup
        Parameters:
        nRows - The number of rows in the column group, this is used for groups that does not contain information about how many rows they have.
        Returns:
        The nnz.
      • estimateInMemorySize

        public long estimateInMemorySize()
        Description copied from class: AColGroup
        Get the upper bound estimate of in memory allocation for the column group.
        Overrides:
        estimateInMemorySize in class ADictBasedColGroup
        Returns:
        an upper bound on the number of bytes used to store this ColGroup in memory.
      • replace

        public AColGroup replace​(double pattern,
                                 double replace)
        Description copied from class: AColGroup
        Make a copy of the column group values, and replace all values that match pattern with replacement value.
        Specified by:
        replace in class AColGroup
        Parameters:
        pattern - The value to look for
        replace - The value to replace the other value with
        Returns:
        A new Column Group, reusing the index structure but with new values.
      • centralMoment

        public CM_COV_Object centralMoment​(CMOperator op,
                                           int nRows)
        Description copied from class: AColGroup
        Central Moment instruction executed on a column group.
        Specified by:
        centralMoment in class AColGroup
        Parameters:
        op - The Operator to use.
        nRows - The number of rows contained in the ColumnGroup.
        Returns:
        A Central Moment object.
      • rexpandCols

        public AColGroup rexpandCols​(int max,
                                     boolean ignore,
                                     boolean cast,
                                     int nRows)
        Description copied from class: AColGroup
        Expand the column group to multiple columns. (one hot encode the column group)
        Specified by:
        rexpandCols in class AColGroup
        Parameters:
        max - The number of columns to expand to and cutoff values at.
        ignore - If zero and negative values should be ignored.
        cast - If the double values contained should be cast to whole numbers.
        nRows - The number of rows in the column group.
        Returns:
        A new column group containing max number of columns.