plume

Class MultiRandSelector<T>

java.lang.Object

plume.MultiRandSelector<T>

Type Parameters:

T - the type of elements to be selected among

Deprecated.

use org.plumelib.util.MultiRandSelector

@Deprecated
public class MultiRandSelector<T>
extends java.lang.Object

Performs uniform random selection over an iterator, where the objects in the iteration may be partitioned so that the random selection chooses the same number from each group.

For example, given data about incomes by state, it may be more useful to select 1000 people from each state rather than 50,000 from the nation. As another example, for selecting invocations in a Daikon trace file, it may be more useful to select an equal number of samples per program point.

The performance is the same as running a set of RandomSelector Objects, one for each bucket, plus some overhead for determining which bucket to assign to each Object in the iteration.

To use this class, call this.accept() on every Object in the iteration to be sampled. Then, call valuesIter() to receive an iteration of all the values selected by the random selection.

See Also:

RandomSelector

Constructor Summary

Constructors

Constructor and Description
MultiRandSelector(double keep_prob, Partitioner<T,T> eq) Deprecated.
MultiRandSelector(double keep_prob, java.util.Random r, Partitioner<T,T> eq) Deprecated.
MultiRandSelector(int num_elts, Partitioner<T,T> eq) Deprecated.
MultiRandSelector(int num_elts, java.util.Random r, Partitioner<T,T> eq) Deprecated.

Method Summary

Modifier and Type	Method and Description
void	accept(T next) Deprecated.
void	acceptIter(java.util.Iterator<T> iter) Deprecated.
java.util.Map<T,RandomSelector<T>>	values() Deprecated.
java.util.Iterator<T>	valuesIter() Deprecated. Returns an iterator of all objects selected.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MultiRandSelector

public MultiRandSelector(int num_elts,
                         Partitioner<T,T> eq)

Deprecated.

Parameters:

num_elts - the number of elements to select from each bucket

eq - partioner that determines how to partition the objects from the iteration

MultiRandSelector

public MultiRandSelector(double keep_prob,
                         Partitioner<T,T> eq)

Deprecated.

MultiRandSelector

public MultiRandSelector(int num_elts,
                         java.util.Random r,
                         Partitioner<T,T> eq)

Deprecated.

MultiRandSelector

public MultiRandSelector(double keep_prob,
                         java.util.Random r,
                         Partitioner<T,T> eq)

Deprecated.

Method Detail

acceptIter

public void acceptIter(java.util.Iterator<T> iter)

Deprecated.

accept

public void accept(T next)

Deprecated.

values

public java.util.Map<T,RandomSelector<T>> values()

Deprecated.

valuesIter

public java.util.Iterator<T> valuesIter()

Deprecated.

Returns an iterator of all objects selected.

Returns:

an iterator of all objects selected