

``mx.nd.random.pdf.negative.binomial``
============================================================================

Description
----------------------

Computes the value of the PDF of samples of
negative binomial distributions with parameters *k* (failure limit) and *p* (failure probability).

*k* and *p* must have the same shape, which must match the leftmost subshape
of *sample*.  That is, *sample* can have the same shape as *k* and *p*, 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 values of *k* and *p* at index *i*.


**Example**::

	 
	 random_pdf_negative_binomial(sample=[[1,2,3,4]], k=[1], p=a[0.5]) =
	 [[0.25, 0.125, 0.0625, 0.03125]]
	 
	 # Note that k may be real-valued
	 sample = [[1,2,3,4],
	 [1,2,3,4]]
	 random_pdf_negative_binomial(sample=sample, k=[1, 1.5], p=[0.5, 0.5]) =
	 [[0.25,       0.125,      0.0625,     0.03125   ],
	 [0.26516506, 0.16572815, 0.09667476, 0.05437956]]
	 
	 
Arguments
------------------

+----------------------------------------+------------------------------------------------------------+
| Argument                               | Description                                                |
+========================================+============================================================+
| ``sample``                             | NDArray-or-Symbol.                                         |
|                                        |                                                            |
|                                        | Samples from the distributions.                            |
+----------------------------------------+------------------------------------------------------------+
| ``k``                                  | NDArray-or-Symbol.                                         |
|                                        |                                                            |
|                                        | Limits of unsuccessful experiments.                        |
+----------------------------------------+------------------------------------------------------------+
| ``is.log``                             | boolean, optional, default=0.                              |
|                                        |                                                            |
|                                        | If set, compute the density of the log-probability instead |
|                                        | of the                                                     |
|                                        | probability.                                               |
+----------------------------------------+------------------------------------------------------------+
| ``p``                                  | NDArray-or-Symbol.                                         |
|                                        |                                                            |
|                                        | Failure probabilities in each experiment.                  |
+----------------------------------------+------------------------------------------------------------+

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#L310