What is the C++ xtensor library equivalent of pandas groupby? Or, how can I easily group a dataframe with C++ xtensor library?
What is the xtensor equivalent of pandas `groupby`?
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xtensor does what numpy does for python. The functionality in pandas is not replicated in xtensor.
Have you looked at boost.python as a method of binding the functionality together. This will allow you to get the c++ datastructures into the python framework and use the pandas groupby there.