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mindspore.ops.HistogramFixedWidth

class mindspore.ops.HistogramFixedWidth(nbins, dtype='int32')

Returns a rank 1 histogram counting the number of entries in values that fall into every bin. The bins are equal width and determined by the inputs range and the arguments nbins.

Parameters

• nbins (int) – The number of histogram bins, the type is a positive integer.

• dtype (str, optional) – An optional attribute. The dtype must be str. Default: 'int32' .

Inputs:

• x (Tensor) - Numeric Tensor. Must be one of the following types: int32, float32, float16.

• range (Tensor) - Must have the same data type as x, and the shape is $(2,)$. x <= range[0] will be mapped to histogram[0], x >= range[1] will be mapped to histogram[-1].

Outputs:

1-D Tensor, whose length is the type is nbins with dtype of int32.

Raises

• TypeError – If dtype is not a str or nbins is not an int.

• ValueError – If nbins is less than 1.

• ValueError – If dtype is not 'int32'.

Supported Platforms:

Ascend GPU

Examples

>>> import mindspore
>>> from mindspore import Tensor, ops
>>> x = Tensor([-1.0, 0.0, 1.5, 2.0, 5.0, 15], mindspore.float16)
>>> range_op = Tensor([0.0, 5.0], mindspore.float16)
>>> hist = ops.HistogramFixedWidth(5)
>>> output = hist(x, range_op)
>>> print(output)
[2 1 1 0 2]