mask = a < b

a[mask] = b[mask]

The above assignment does NOT work (both a and b are in shape [B,N,C]). What is the correct way to assign values for this? Thanks

mask = a < b

a[mask] = b[mask]

The above assignment does NOT work (both a and b are in shape [B,N,C]). What is the correct way to assign values for this? Thanks

The output of the mask in numpy is a boolean array. NDArray doesnâ€™t support boolean dtype. Another way in numpy is to use `np.where(condition, [x, y])`

so the assignment will be `a = np.where(a < b, b, a)`

. Equivalently for NDArray, you can use `a = nd.where(a < b, b, a)`

. Note that, for inplace update, you need to wither use `a[:]`

or `nd.where(a < b, b, a, out=a)`

as shown here.