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NumPy-style histograms in PyTorch

Project description

NumPy-style histograms in PyTorch

The torchist package implements NumPy's histogram and histogramdd functions in PyTorch with support for non-uniform binning. The package also features implementations of ravel_multi_index, unravel_index and some useful functionals (e.g. KL divergence).


The torchist package is available on PyPI, which means it is installable with pip:

pip install torchist

Alternatively, if you need the latest features, you can install it using

pip install git+

or copy the package directly to your project, with

git clone
cp -R torchist/torchist <path/to/project>/torchist

Getting Started

import torch
import torchist

x = torch.rand(100, 3).cuda()

hist = torchist.histogramdd(x, bins=10, low=0., upp=1.)

print(hist.shape)  # (10, 10, 10)


The implementations of torchist are on par or faster than those of numpy on CPU and benefit greately from CUDA capabilities.

$ python torchist/
np.histogram : 1.2559 s
np.histogramdd : 20.7816 s
np.histogram (non-uniform) : 5.4878 s
np.histogramdd (non-uniform) : 17.3757 s
torchist.histogram : 1.3975 s
torchist.histogramdd : 9.6160 s
torchist.histogram (non-uniform) : 5.0883 s
torchist.histogramdd (non-uniform) : 17.2743 s

torchist.histogram : 0.1363 s
torchist.histogramdd : 0.3754 s
torchist.histogram (non-uniform) : 0.1355 s
torchist.histogramdd (non-uniform) : 0.5137 s

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