What is the correct way to convert numpy array into ray’s dataset? I tried the following, but its not working.

```
import numpy as np
arr = np.array([[1.9, 1.0, 1.1, 0.9],
[1.8, 1.0, 1.1, 0.9],
[1.7, 1.0, 1.2, 0.8],
[1.6, 1.0, 1.3, 0.9],
[1.5, 1.0, 1.4, 0.9]])
print(arr)
ds=ray.data.from_numpy(arr)
ds.show(10)
```

Numpy array is not stored in ray dataset correctly. It is saved as

```
{'value': array(1.9)}
{'value': array(1.)}
{'value': array(1.1)}
{'value': array(0.9)}
{'value': array(1.8)}
{'value': array(1.)}
{'value': array(1.1)}
{'value': array(0.9)}
{'value': array(1.7)}
{'value': array(1.)}
```

Thanks in advance