I was transforming categorical features using factorize() function which returns a tuple of a cupy array and strings. I assigned the cupy array into a variable named codes. However, I can't seem to get the unique values of codes using codes.unique()
It returns an error message:
AttrubuteError: 'cupy.core.core.ndarray' object has no attribute 'unique'
# use factorize to create continuous integers from a categorical feature (returns a tuple)codes, uniques = df_train['product_id'].factorize()codes.unique()---------------------------------------------------------------------------AttributeError Traceback (most recent call last)<ipython-input-59-27db0fac06a1> in <module>()----> 1 codes.unique()AttributeError: 'cupy.core.core.ndarray' object has no attribute 'unique'code
Appreciate the help and suggestion to make it work
Best Answer
CuPy is designed to be highly compatible with NumPy, and in this case note that numpy.ndarray does not have a unique() method either; for both NumPy and CuPy it lives under the main namespace as a regular function (numpy.unique()/cupy.unique()). So it is an invalid usage not specific to CuPy IMHO.
I think you need to call cupy.unique(codes) instead of codes.unique() like you could if it were a regular NumPy array. Docs: https://docs.cupy.dev/en/stable/reference/generated/cupy.unique.html
It was added in this PR: https://github.com/cupy/cupy/pull/1140 which as you may be able to see did not add it as a method on the array type.