xtensor

"xtensor is a C++ library meant for numerical analysis with multi-dimensional array expressions.
xtensor provides

• an extensible expression system enabling lazy broadcasting.
• an API following the idioms of the C++ standard library.
• tools to manipulate array expressions and build upon xtensor.

Containers of xtensor are inspired by NumPy, the Python array programming library. Adaptors for existing data structures to be plugged into our expression system can easily be written. In fact, xtensor can be used to process numpy data structures inplace using Python’s buffer protocol. For more details on the numpy bindings, check out the xtensor-python project.
xtensor requires a modern C++ compiler supporting C++14. The following C+ compilers are supported:

• On Windows platforms, Visual C++ 2015 Update 2, or more recent
• On Unix platforms, gcc 4.9 or a recent version of Clang

 xtensor is a header-only library."

http://quantstack.net/xtensor


Python bindings for the xtensor C++ multi-dimensional array library.

• xtensor is a C++ library for multi-dimensional arrays enabling numpy-style broadcasting and lazy computing.
  
• xtensor-python enables inplace use of numpy arrays in C++ with all the benefits from xtensor
  
  • C++ universal function and broadcasting
  • STL - compliant APIs.
  • A broad coverage of numpy APIs (see the numpy to xtensor cheat sheet).

The Python bindings for xtensor are based on the pybind11 C++ library, which enables seemless interoperability between C++ and Python.

https://github.com/QuantStack/xtensor-python