Nbody jacobian test #77
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Haven't got around to see what YAPF formatting is, but I was looking at the test file and unless I am missing something, I am assuming this line will be a problem as it's an import from a different repo? I think we should make the pk function a part of flowpm/utils.py since it's kind of on similar footing as cic_paint and cic_readout. What do you guys think. |
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I have added a test function to validate the Automatic differentiation implemented by TensorFlow. This test computes the Jacobians of the 3D power spectrum of the N-body simulation both by Automatic differentiation and finite differences.
The two derivatives are comparable with a tolerance error of 0.1 .
Sadly this test is a bit slow (it spends about 6/7 minutes).
I also have added a notebook with a plot to compare the two Jacobians.
https://github.com/DifferentiableUniverseInitiative/flowpm/blob/Nbody_jacobian/notebooks/num_theo_jacobian.ipynb