JuliaDiff / JuliaDiff/ForwardDiff.jl

Unitful support

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#328 11 comments 8 reactions 0 assignees View on GitHub

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Dominant language
Julia
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Description

Unitful and ForwardDiff don't play well together. But it would be good if they did! stripping the units out of a model to run ForwardDiff for a jacobian etc. isn't always feasible, in my case it would mean adding a lot of manual conversions and tests.

Loosening some Real types to Number would get some of the way, but there are probably deeper problems.

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First steps

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  3. Fork the repository and make your change on a branch.
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Research direction

Start by reproducing the interaction between Unitful models and ForwardDiff’s Jacobian calculation, then inspect the type assumptions around Real and Number. The issue does not name files or tests; done means Unitful-valued models can be differentiated without stripping units or adding extensive manual conversions.

Written by the indexing model from the issue text.

Assessment

Tech stack
julia
Domain
devtools
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
35/100

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