get stddev and other rolling

[adaubas]

Hello,
May I ask if it is possible to add a get_cu_rolling_stddev_transform function, and a get_cu_rolling_nunique_transform function and at last a get_cu_rolling_count_transform function ? Please

[aerdem4]

I have thought about it but I think it will be very difficult to implement rolling count and nunique given the limitations from Numba CUDA functions. But we can implement stddev.

[adaubas]

I did not realize how difficult it could be. A stddev function will be great !