Restoring missing data using neural network

I have data with empty values in some columns. I need to recover them using neural networks. Search in Google did not give me a specific answer: what should I do. In general, for this request, I found little information. It occurred to me one way, but I'm not sure if it is correct. I tried to depict the meaning in paint. I hope my meaning is clear fashion.

Answer 1

[Greg Heath]

I would just fill in the blanks by averaging nearest neightbors.

Hope this helps.

Greg