Best Way to handle null values in Input Tensor

[rajandeepsingh13]

Environment (please complete the following information):

• OS/OS Version: Windows
• Source Version: v2.10
• Unity Version: Unity 2021.3.5.f1

Describe the bug
I am not sure how to pass an Input Tensor that has null values to the Interpreter. My current input is formatted as float?[,,] 3D array but that gives me an "ArgumentException: Object must be an array of primitives." error. What would be the best way to represent an input tensor with null values?

Error message
Here is the complete error:

[asus4]

@rajandeepsingh13 nullable is different type. Unbox it before calling SetInputTensorData
https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/builtin-types/nullable-value-types

[rajandeepsingh13]

I see your point, however, looking at nullable arrays, I don't think I can unbox them. They might not be the best data structure to implement what I want to anyway. How would you recommend I implement null value in a non-null array?

For example, I want to pass the following input tensor: [0.23, null, 043, 0.76]. What data structure should/can I use to pass these values to SetInputTensorData? I can't use float[] because I have a null value.

Also, thank you so much for your help so far! You have been awesome!

[asus4]

SetInputTensorData is a thin wrapper of the TFLite C API. AFAIK, the null value is not supported in the TensorFlow Lite C-API.

https://github.com/tensorflow/tensorflow/blob/052c468d4bb8c0c90c55c9530d422967baec0ec2/tensorflow/lite/core/c/c_api.h#L459-L462

I think you can set 0 instead of null. but if you need to support float?[,,], please open a new issue to the TensorFlow repo