Class GetItemsPointOp<T>

Provides outgoing messages for GetItems<T>(IReadOnlyList<T>, IReadOnlyList<Int32>), given random arguments to the function.

Inheritance
Object
GetItemsPointOp<T>
Inherited Members
Namespace: Microsoft.ML.Probabilistic.Factors
Assembly: Microsoft.ML.Probabilistic.dll
Syntax
[FactorMethod(typeof(Collection), "GetItems<>", new Type[]{}, Default = false)]
[Quality(QualityBand.Experimental)]
public static class GetItemsPointOp<T>
Type Parameters
Name Description
T

The type of an item.

Methods

ItemsAverageConditional<DistributionType>(IList<DistributionType>, IList<Int32>, Int32, DistributionType)

EP message to items.

Declaration
public static DistributionType ItemsAverageConditional<DistributionType>([SkipIfAllUniform] IList<DistributionType> array, IList<int> indices, int resultIndex, DistributionType result)
    where DistributionType : SettableTo<DistributionType>
Parameters
Type Name Description
IList<DistributionType> array

Incoming message from array. Must be a proper distribution. If all elements are uniform, the result will be uniform.
IList<Int32> indices

Incoming message from indices.
Int32 resultIndex

Index of the items for which a message is desired.
DistributionType result

Modified to contain the outgoing message.
Returns
Type Description
DistributionType

result
Type Parameters
Name Description
DistributionType

The type of a distribution over array elements.
Remarks

The outgoing message is a distribution matching the moments of items as the random arguments are varied. The formula is proj[p(items) sum_(array,indices) p(array,indices) factor(items,array,indices)]/p(items).

Exceptions
Type Condition
ImproperMessageException

array is not a proper distribution.