v2.0.0a1

This is an alpha release of v2.0.0. There will still be changes before the release of v2.0.0, likely including new hyperparameter defaults.

What's Changed

Major changes

Multiple features (update backend to 2.0) (#999)

This PR updates the backend to SymbolicRegression.jl 2.0.0-alpha.8 and exposes several major new features:

• N-ary operators: Support for operators with arbitrary arity (not just unary/binary)
  • Added 3-arity operators: fma (fused multiply-add), clamp, etc.
  • This can be used via a new operators parameter dictionary: operators={1: ["sin"], 2: ["+", "*"], 3: ["clamp"]}
• Equation guesses: Pass initial equation guesses to guide the search using the guesses parameter to fit
  • For example: guesses=["sin(x0 * 2.1 - 0.5)", "x0 * 3.0 + x2"] provides two guesses
  • Control injection rate with fraction_replaced_guesses
• Advanced autodiff backends: Experimental support for Mooncake.jl and Enzyme.jl
  • Enzyme.jl support via autodiff_backend="Enzyme" (fragile/experimental)
  • Mooncake.jl (experimental - currently disabled pending upstream fix)
• Feature node mutation: New mutation operator that directly modifies which features are used
  • Control mutation weight with weight_mutate_feature
• Worker management:
  • worker_imports: specify Julia packages to import on workers
  • worker_timeout: control timeout for worker processes

Automatic batching for big data (#1045)

Other changes

• docs: add vector expression example by @MilesCranmer in #1041
• [pre-commit.ci] pre-commit autoupdate by @pre-commit-ci[bot] in #1008
• chore(deps): bump actions/checkout from 4 to 5 by @dependabot[bot] in #1009
• ci: update Dockerfile image by @MilesCranmer in #1022
• test: update docker versions by @MilesCranmer in #1023
• chore(deps): bump actions/setup-python from 5 to 6 by @dependabot[bot] in #1027
• deps: update min python to 3.9 by @MilesCranmer in #1052
• deps: bump juliacall requirement by @dependabot[bot] in #1035
• chore(deps): bump actions/checkout from 4 to 5 by @dependabot[bot] in #1049
• chore(deps): bump github/codeql-action from 3 to 4 by @dependabot[bot] in #1050
• chore(deps): bump actions/setup-python from 5 to 6 by @dependabot[bot] in #1051
• chore(deps): update beartype requirement from <0.22,>=0.19 to >=0.19,<0.23 by @dependabot[bot] in #1047
• chore: update pyjuliacall requirement in environment.yml by @MilesCranmer in #1054

Full Changelog: v1.5.9...v2.0.0a1

v1.5.9

What's Changed

• [pre-commit.ci] pre-commit autoupdate by @pre-commit-ci[bot] in #853
• Fix type error in feature selection code by @MilesCranmer in #952
• chore(deps): update juliacall requirement from <0.9.26,>=0.9.24 to >=0.9.24,<0.9.27 by @dependabot[bot] in #980

Full Changelog: v1.5.8...v1.5.9

v1.5.8

What's Changed

• fix: compat with python 3.8 by removing beartype by @MilesCranmer in #935
• ci: update workflows to test 3.13 by @MilesCranmer in #929
• style: fix newline in warning by @MilesCranmer in #931
• ci: switch to codecov by @MilesCranmer in #932
• deps: fix local conda env versions by @MilesCranmer in #933

Full Changelog: v1.5.7...v1.5.8

v1.5.7

What's Changed

• Enable negative losses by @MilesCranmer in #928
• Recommend TemplateExpressionSpec over ParametricExpressionSpec @MilesCranmer in #920
• Fix multi-output template expressions by @MilesCranmer in #921
• build: switch to hatchling by @MilesCranmer in #888
• chore(deps): bump juliacall from 0.9.24 to 0.9.25 by @dependabot in #925
• fix: turn off double warning for ParametricExpressionSpec by @MilesCranmer in #930

Full Changelog: v1.5.6...v1.5.7

v1.5.6

What's Changed

• Added paper contribution and image by @manuel-morales-a in #824
• fix: pickling of inv by @MilesCranmer in #910
• Automated update to backend: v1.10.0 by @github-actions in #890

New Contributors

• @manuel-morales-a made their first contribution in #824

Full Changelog: v1.5.5...v1.5.6

v1.5.5

What's Changed

• fix: typing extensions dependency by @MilesCranmer in #885

Full Changelog: v1.5.4...v1.5.5

v1.5.4

What's Changed

• Compat with older Python by @MilesCranmer in #884

Full Changelog: v1.5.3...v1.5.4

v1.5.3

What's Changed

• fix: change sympy mappings ordering by @romanovzky in #868

New Contributors

• @romanovzky made their first contribution in #868

Full Changelog: v1.5.2...v1.5.3

v1.5.2

What's Changed

• fix: mapping of cbrt by @MilesCranmer in #858

Full Changelog: v1.5.1...v1.5.2

v1.5.1

What's Changed

• fix: comparison operator parsing by @MilesCranmer in #845

Full Changelog: v1.5.0...v1.5.1