Dynamically dimension tensors for which the shape is heap allocated come at a small additional cost. The shape type of a broadcasting expression whose members have a dimensionality determined at compile time will have a stack allocated sequence type.
If at least one note of a broadcasting expression has a dynamic dimension for example an xarray , it bubbles up to the entire broadcasting expression which will have a heap allocated shape. The same hold for views, broadcast expressions, etc Therefore, when building an application with xtensor, we recommend using statically-dimensioned containers whenever possible to improve the overall performance of the application.
The xtensor-python project provides the implementation of two xtensor containers, pyarray and pytensor which effectively wrap NumPy arrays, allowing inplace modification, including reshapes. Utilities to automatically generate NumPy-style universal functions, exposed to Python from scalar functions are also provided.
The xtensor-julia project provides the implementation of two xtensor containers, jlarray and jltensor which effectively wrap julia arrays, allowing inplace modification, including reshapes. The xtensor-r project provides the implementation of two xtensor containers, rarray and rtensor which effectively wrap R arrays, allowing inplace modification, including reshapes. Like for the Python and Julia bindings, utilities to generate NumPy-style universal functions are provided.
The xtensor-blas project provides bindings to BLAS libraries, enabling linear-algebra operations on xtensor expressions. The xtensor-io project enables the loading of a variety of file formats into xtensor expressions, such as image files, sound files, HDF5 files, as well as NumPy npy and npz files. Building the tests requires the GTest testing framework and cmake. Besides, they can also be installed with the conda package manager even on windows :. You can also use CMake to download the source of gtest , build it, and use the generated libraries:.
Finally, go to docs subdirectory and build the documentation with the following command:. We use a shared copyright model that enables all contributors to maintain the copyright on their contributions. This software is licensed under the BSDClause license.
Expand your skills. Get new features first. Was this information helpful? Yes No. Thank you! Any more feedback? The more you tell us the more we can help. Can you help us improve? Resolved my issue. Clear instructions. Easy to follow. No jargon. Pictures helped. It allows the presence of a metric in each manifold and defines all the associated tensors Riemann, Ricci, Einstein, Weyl, etc. Use the companion package xCoba. Current version: 1. It is recommended to download the main xAct bundle , but you can also download the different files separately:.
Related sites: www. See xTensor.
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