dask-ml: How to chunk dask array with unknown chunks

Hi All,

I have two dask arrays with shape X:(nan, 42), y:(nan,). I my goal is to fit these into a SGDRegressor dask-ml model. However, when I use it I am given an error saying that Cannot operate on Dask array with unknown chunk sizes. #453

Could anyone be able to tell me what should be done.

Thanks

Michael