IndexError: too many indices for array - Non-linear matrix factorization with missing values using Gaussian Processes - using pymc3

Questions v3
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:slight_smile: Just in case someone is interested or encounters a similar problem:
Solved by giving the GP prior the right shape and removing the transpose.

  • I am not sure yet, whether the logic is correct, which I am currently verifying, but the code runs and debugging is possible.