xtensor provides the following accumulating functions for xexpressions:
Defined in xtensor/xmath.hpp
.. doxygenfunction:: cumsum(E&&) :project: xtensor
.. doxygenfunction:: cumsum(E&&, std::ptrdiff_t) :project: xtensor
.. doxygenfunction:: cumprod(E&&) :project: xtensor
.. doxygenfunction:: cumprod(E&&, std::ptrdiff_t) :project: xtensor