| |
| |
| ``mx.nd.random.pdf.dirichlet`` |
| ============================================================ |
| |
| Description |
| ---------------------- |
| |
| Computes the value of the PDF of *sample* of |
| Dirichlet distributions with parameter *alpha*. |
| |
| The shape of *alpha* must match the leftmost subshape of *sample*. That is, *sample* |
| can have the same shape as *alpha*, in which case the output contains one density per |
| distribution, or *sample* can be a tensor of tensors with that shape, in which case |
| the output is a tensor of densities such that the densities at index *i* in the output |
| are given by the samples at index *i* in *sample* parameterized by the value of *alpha* |
| at index *i*. |
| |
| |
| **Example**:: |
| |
| |
| random_pdf_dirichlet(sample=[[1,2],[2,3],[3,4]], alpha=[2.5, 2.5]) = |
| [38.413498, 199.60245, 564.56085] |
| |
| sample = [[[1, 2, 3], [10, 20, 30], [100, 200, 300]], |
| [[0.1, 0.2, 0.3], [0.01, 0.02, 0.03], [0.001, 0.002, 0.003]]] |
| |
| random_pdf_dirichlet(sample=sample, alpha=[0.1, 0.4, 0.9]) = |
| [[2.3257459e-02, 5.8420084e-04, 1.4674458e-05], |
| [9.2589635e-01, 3.6860607e+01, 1.4674468e+03]] |
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| |
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| Arguments |
| ------------------ |
| |
| +----------------------------------------+------------------------------------------------------------+ |
| | Argument | Description | |
| +========================================+============================================================+ |
| | ``sample`` | NDArray-or-Symbol. | |
| | | | |
| | | Samples from the distributions. | |
| +----------------------------------------+------------------------------------------------------------+ |
| | ``alpha`` | NDArray-or-Symbol. | |
| | | | |
| | | Concentration parameters of the distributions. | |
| +----------------------------------------+------------------------------------------------------------+ |
| | ``is.log`` | boolean, optional, default=0. | |
| | | | |
| | | If set, compute the density of the log-probability instead | |
| | | of the | |
| | | probability. | |
| +----------------------------------------+------------------------------------------------------------+ |
| |
| Value |
| ---------- |
| |
| ``out`` The result mx.ndarray |
| |
| |
| Link to Source Code: http://github.com/apache/incubator-mxnet/blob/1.6.0/src/operator/random/pdf_op.cc#L316 |
| |
