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tensoreflusso:: ops:: CasualePoissonV2
#include <random_ops.h>
Restituisce valori casuali dalle distribuzioni di Poisson descritte dalla velocità.
Riepilogo
Questa operazione utilizza due algoritmi, a seconda della velocità. Se la velocità >= 10, viene utilizzato l'algoritmo di Hormann per acquisire campioni tramite trasformazione-rifiuto. Vedere http://www.sciencedirect.com/science/article/pii/0167668793909974 .
Altrimenti, l'algoritmo di Knuth viene utilizzato per acquisire campioni moltiplicando variabili casuali uniformi. Vedi Donald E. Knuth (1969). Algoritmi seminumerici. L'arte della programmazione informatica, volume 2. Addison Wesley
Argomenti:
- scope: un oggetto Scope
- forma: tensore intero 1-D. Forma dei campioni indipendenti da trarre da ciascuna distribuzione descritta dai parametri di forma indicati in velocità.
- tasso: un tensore in cui ogni scalare è un parametro di "velocità" che descrive la distribuzione di Poisson associata.
Attributi facoltativi (vedi Attrs
):
- seme: se
seed
o seed2
sono impostati su un valore diverso da zero, il generatore di numeri casuali viene seminato dal seme specificato. Altrimenti, viene seminato da un seme casuale. - seed2: un secondo seme per evitare la collisione del seme.
Resi:
-
Output
: un tensore con shape + shape(rate)
. Ogni sezione [:, ..., :, i0, i1, ...iN]
contiene i campioni estratti per rate[i0, i1, ...iN]
.
Funzioni pubbliche statiche |
---|
Dtype (DataType x) | |
Seed (int64 x) | |
Seed2 (int64 x) | |
Attributi pubblici
Funzioni pubbliche
nodo
::tensorflow::Node * node() const
operator::tensorflow::Input() const
operatore::tensorflow::Output
operator::tensorflow::Output() const
Funzioni pubbliche statiche
Tipo D
Attrs Dtype(
DataType x
)
Seme
Attrs Seed(
int64 x
)
Seme2
Attrs Seed2(
int64 x
)
Salvo quando diversamente specificato, i contenuti di questa pagina sono concessi in base alla licenza Creative Commons Attribution 4.0, mentre gli esempi di codice sono concessi in base alla licenza Apache 2.0. Per ulteriori dettagli, consulta le norme del sito di Google Developers. Java è un marchio registrato di Oracle e/o delle sue consociate.
Ultimo aggiornamento 2025-07-26 UTC.
[null,null,["Ultimo aggiornamento 2025-07-26 UTC."],[],[],null,["# tensorflow::ops::RandomPoissonV2 Class Reference\n\ntensorflow::ops::RandomPoissonV2\n================================\n\n`#include \u003crandom_ops.h\u003e`\n\nOutputs random values from the Poisson distribution(s) described by rate.\n\nSummary\n-------\n\nThis op uses two algorithms, depending on rate. If rate \\\u003e= 10, then the algorithm by Hormann is used to acquire samples via transformation-rejection. See \u003chttp://www.sciencedirect.com/science/article/pii/0167668793909974\u003e.\n\nOtherwise, Knuth's algorithm is used to acquire samples via multiplying uniform random variables. See Donald E. Knuth (1969). Seminumerical Algorithms. The Art of Computer Programming, Volume 2. Addison Wesley\n\nArguments:\n\n- scope: A [Scope](/versions/r1.15/api_docs/cc/class/tensorflow/scope#classtensorflow_1_1_scope) object\n- shape: 1-D integer tensor. Shape of independent samples to draw from each distribution described by the shape parameters given in rate.\n- rate: A tensor in which each scalar is a \"rate\" parameter describing the associated poisson distribution.\n\n\u003cbr /\u003e\n\nOptional attributes (see [Attrs](/versions/r1.15/api_docs/cc/struct/tensorflow/ops/random-poisson-v2/attrs#structtensorflow_1_1ops_1_1_random_poisson_v2_1_1_attrs)):\n\n- seed: If either `seed` or `seed2` are set to be non-zero, the random number generator is seeded by the given seed. Otherwise, it is seeded by a random seed.\n- seed2: A second seed to avoid seed collision.\n\n\u003cbr /\u003e\n\nReturns:\n\n- [Output](/versions/r1.15/api_docs/cc/class/tensorflow/output#classtensorflow_1_1_output): A tensor with shape `shape + shape(rate)`. Each slice `[:, ..., :, i0, i1, ...iN]` contains the samples drawn for `rate[i0, i1, ...iN]`.\n\n\u003cbr /\u003e\n\n| ### Constructors and Destructors ||\n|---|---|\n| [RandomPoissonV2](#classtensorflow_1_1ops_1_1_random_poisson_v2_1ac6781b746b5d655d44cf7298d0ec0e8d)`(const ::`[tensorflow::Scope](/versions/r1.15/api_docs/cc/class/tensorflow/scope#classtensorflow_1_1_scope)` & scope, ::`[tensorflow::Input](/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input)` shape, ::`[tensorflow::Input](/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input)` rate)` ||\n| [RandomPoissonV2](#classtensorflow_1_1ops_1_1_random_poisson_v2_1affe491853f03c22d0d69fe155380690d)`(const ::`[tensorflow::Scope](/versions/r1.15/api_docs/cc/class/tensorflow/scope#classtensorflow_1_1_scope)` & scope, ::`[tensorflow::Input](/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input)` shape, ::`[tensorflow::Input](/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input)` rate, const `[RandomPoissonV2::Attrs](/versions/r1.15/api_docs/cc/struct/tensorflow/ops/random-poisson-v2/attrs#structtensorflow_1_1ops_1_1_random_poisson_v2_1_1_attrs)` & attrs)` ||\n\n| ### Public attributes ||\n|-----------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------|\n| [operation](#classtensorflow_1_1ops_1_1_random_poisson_v2_1a8a6d22a45ef402122008fd37ae60584a) | [Operation](/versions/r1.15/api_docs/cc/class/tensorflow/operation#classtensorflow_1_1_operation) |\n| [output](#classtensorflow_1_1ops_1_1_random_poisson_v2_1aacc4e0f70e7215919fd2ed050cc778ec) | `::`[tensorflow::Output](/versions/r1.15/api_docs/cc/class/tensorflow/output#classtensorflow_1_1_output) |\n\n| ### Public functions ||\n|-----------------------------------------------------------------------------------------------------------------------------|------------------------|\n| [node](#classtensorflow_1_1ops_1_1_random_poisson_v2_1a2c4c1c5791ce65536c0711c345c5104f)`() const ` | `::tensorflow::Node *` |\n| [operator::tensorflow::Input](#classtensorflow_1_1ops_1_1_random_poisson_v2_1a680111c81759da8f485b7c57830a97c8)`() const ` | ` ` ` ` |\n| [operator::tensorflow::Output](#classtensorflow_1_1ops_1_1_random_poisson_v2_1ab0e8e0cee5576ad5d628eb26db934fc6)`() const ` | ` ` ` ` |\n\n| ### Public static functions ||\n|---------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------|\n| [Dtype](#classtensorflow_1_1ops_1_1_random_poisson_v2_1a16ea2843b7cb14092e392a1634d5f9d3)`(DataType x)` | [Attrs](/versions/r1.15/api_docs/cc/struct/tensorflow/ops/random-poisson-v2/attrs#structtensorflow_1_1ops_1_1_random_poisson_v2_1_1_attrs) |\n| [Seed](#classtensorflow_1_1ops_1_1_random_poisson_v2_1a4923276f993adff27a39549f725e140c)`(int64 x)` | [Attrs](/versions/r1.15/api_docs/cc/struct/tensorflow/ops/random-poisson-v2/attrs#structtensorflow_1_1ops_1_1_random_poisson_v2_1_1_attrs) |\n| [Seed2](#classtensorflow_1_1ops_1_1_random_poisson_v2_1a3db3d3b1dcf6fd61014a43d46719c992)`(int64 x)` | [Attrs](/versions/r1.15/api_docs/cc/struct/tensorflow/ops/random-poisson-v2/attrs#structtensorflow_1_1ops_1_1_random_poisson_v2_1_1_attrs) |\n\n| ### Structs ||\n|----------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| [tensorflow::ops::RandomPoissonV2::Attrs](/versions/r1.15/api_docs/cc/struct/tensorflow/ops/random-poisson-v2/attrs) | Optional attribute setters for [RandomPoissonV2](/versions/r1.15/api_docs/cc/class/tensorflow/ops/random-poisson-v2#classtensorflow_1_1ops_1_1_random_poisson_v2). |\n\nPublic attributes\n-----------------\n\n### operation\n\n```text\nOperation operation\n``` \n\n### output\n\n```text\n::tensorflow::Output output\n``` \n\nPublic functions\n----------------\n\n### RandomPoissonV2\n\n```gdscript\n RandomPoissonV2(\n const ::tensorflow::Scope & scope,\n ::tensorflow::Input shape,\n ::tensorflow::Input rate\n)\n``` \n\n### RandomPoissonV2\n\n```gdscript\n RandomPoissonV2(\n const ::tensorflow::Scope & scope,\n ::tensorflow::Input shape,\n ::tensorflow::Input rate,\n const RandomPoissonV2::Attrs & attrs\n)\n``` \n\n### node\n\n```gdscript\n::tensorflow::Node * node() const \n``` \n\n### operator::tensorflow::Input\n\n```gdscript\n operator::tensorflow::Input() const \n``` \n\n### operator::tensorflow::Output\n\n```gdscript\n operator::tensorflow::Output() const \n``` \n\nPublic static functions\n-----------------------\n\n### Dtype\n\n```carbon\nAttrs Dtype(\n DataType x\n)\n``` \n\n### Seed\n\n```text\nAttrs Seed(\n int64 x\n)\n``` \n\n### Seed2\n\n```text\nAttrs Seed2(\n int64 x\n)\n```"]]