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backprop v0.2.0.0 Release Notes

Release Date: 2018-05-01 // almost 6 years ago

  • May 1, 2018

    🚀 https://github.com/mstksg/backprop/releases/tag/v0.2.0.0

    • Added Backprop class in Numeric.Backprop.Class, which is a typeclass specifically for "backpropagatable" values. This will replace Num.
    • API of Numeric.Backprop completely re-written to require values be instances of Backprop instead of Num. This closes some outstanding issues with the reliance of Num, and allows backpropagation to work with non-Num instances like variable-length vectors, matrices, lists, tuples, etc. (including types from accelerate)
    • Numeric.Backprop.Num and Prelude.Backprop.Num modules added, providing the old interface that uses Num instances instead of Backprop instances, for those who wish to avoid writing orphan instances when working with external types.
    • Numeric.Backprop.Explicit and Prelude.Backprop.Explicit modules added, providing an interface that allows users to manually specify how zeroing, addition, and one-ing works on a per-value basis. Useful for those who wish to avoid writing orphan instances of Backprop for types with no Num instances, or if you are mixing and matching styles.
    • backpropWith variants added, allowing you to specify a "final gradient", instead of assuming it to be 1.
    • Added auto, a shorter alias for constVar inspired by the ad library.
    • Numeric.Backprop.Tuple module removed. I couldn't find a significant reason to keep it now that Num is no longer required for backpropagation.