org.apache.sysds.hops.estim

## Class EstimationUtils

- java.lang.Object
- - org.apache.sysds.hops.estim.EstimationUtils

-     public abstract class EstimationUtils
      extends Object

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `EstimationUtils()`

  - ### Method Summary

    All Methods Static Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `static long` | `getSelfProductOutputNnz(MatrixBlock m1)` This utility function computes the exact output nnz of a self matrix product without need to materialize the output.
    `static long` | `getSparseProductOutputNnz(MatrixBlock m1, MatrixBlock m2)`

    - ### Methods inherited from class java.lang.Object

      `equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### EstimationUtils

          public EstimationUtils()

  - ### Method Detail

    - #### getSelfProductOutputNnz

          public static long getSelfProductOutputNnz(MatrixBlock m1)

      This utility function computes the exact output nnz of a self matrix product without need to materialize the output.
      Parameters:
        `m1` - dense or sparse input matrix
      Returns:
        exact output number of non-zeros.

    - #### getSparseProductOutputNnz

          public static long getSparseProductOutputNnz(MatrixBlock m1,
                                                       MatrixBlock m2)

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