PySR Versions Save

What's Changed

• Warn user when using power laws by @MilesCranmer in https://github.com/MilesCranmer/PySR/pull/399
  • This seems like the most common configuration mistake in PySR: using the ^ operator without setting constraints, leading to extremely complex expressions with poor generalization properties. Thus, this warning will let the user know about it if they set up ^ without constraints.

Full Changelog: https://github.com/MilesCranmer/PySR/compare/v0.15.3...v0.15.4

What's Changed

• Use unicode in printing without needing to decode by @MilesCranmer in https://github.com/MilesCranmer/PySR/pull/398

Full Changelog: https://github.com/MilesCranmer/PySR/compare/v0.15.2...v0.15.3

What's Changed

• Ensure files are read as utf-8 on all operating systems by @MilesCranmer in https://github.com/MilesCranmer/PySR/pull/396

Full Changelog: https://github.com/MilesCranmer/PySR/compare/v0.15.1...v0.15.2

What's Changed

• Fix compat with old scikit-learn versions by @MilesCranmer in https://github.com/MilesCranmer/PySR/pull/393

Full Changelog: https://github.com/MilesCranmer/PySR/compare/v0.15.0...v0.15.1

What's Changed

• Backend version update in https://github.com/MilesCranmer/PySR/pull/389. Includes:
  • Dimensional analysis (see docs examples page)
  • Printing improvements
  • Many misc changes (see below)

Backend Changes

• https://github.com/MilesCranmer/SymbolicRegression.jl/pull/228 and https://github.com/MilesCranmer/SymbolicRegression.jl/pull/230 and https://github.com/MilesCranmer/SymbolicRegression.jl/pull/231 and https://github.com/MilesCranmer/SymbolicRegression.jl/pull/235
  • Dimensional analysis (228)
    • Allows you to (softly) constrain discovered expressions to those that respect physical dimensions
    • Specify X_units and y_units (see https://astroautomata.com/PySR/examples/#10-dimensional-constraints)
  • Printing improvements (228)
    • By default, only 5 significant digits are now printed, rather than the entire float. You can change this with the print_precision option.
    • In the default printed equations, x₁ is used rather than x1.
    • y = is printed at the start (or y₁ = for multi-output). With units this becomes, for example, y[kg] =.
  • Misc
    • Easier to convert from MLJ interface to SymbolicUtils (via node_to_symbolic(::Node, ::AbstractSRRegressor)) (228)
    • Improved precompilation (228)
    • Various performance and type stability improvements (228)
    • Inlined the recording option to speedup compilation (230)
    • Updated Julia tutorials to use MLJ rather than low-level interface (228)
    • Moved JSON3.jl to extension (231)
    • Use PackageExtensionsCompat.jl over Requires.jl (231)
    • Require LossFunctions.jl to be 0.10 (231)
    • Batching inside optimization loop + batching support for custom objectives by (235)
    • Update docker defaults: Julia=1.9.1; Python=3.10.11 in https://github.com/MilesCranmer/PySR/pull/371

Backend Changelog: https://github.com/MilesCranmer/SymbolicRegression.jl/compare/v0.20.0...v0.21.0

PySR Changelog: https://github.com/MilesCranmer/PySR/compare/v0.14.3...v0.15.0

What's Changed

• Self-repairing PyCall installation to lower entrance barrier for new users by @MilesCranmer and @mkitti in https://github.com/MilesCranmer/PySR/pull/363

Full Changelog: https://github.com/MilesCranmer/PySR/compare/v0.14.2...v0.14.3

What's Changed

• Recommend user install with --enable-shared by @MilesCranmer in https://github.com/MilesCranmer/PySR/pull/352
• Automated update to backend: v0.19.1 by @MilesCranmer in https://github.com/MilesCranmer/PySR/pull/355

Backend

Diff since v0.19.0

Merged pull requests on backend:

• CompatHelper: bump compat for StatsBase to 0.34, (keep existing compat) (MilesCranmer/SymbolicRegression.jl#202) (@github-actions[bot])
• (Soft deprecation) change varMap to variable_names (MilesCranmer/SymbolicRegression.jl#219) (@MilesCranmer)
• (Soft deprecation) rename EquationSearch to equation_search (MilesCranmer/SymbolicRegression.jl#222) (@MilesCranmer)
• Fix equation splitting for unicode variables (MilesCranmer/SymbolicRegression.jl#223) (@MilesCranmer)

Full Changelog: https://github.com/MilesCranmer/PySR/compare/v0.14.1...v0.14.2

What's Changed

• Automated update to backend: v0.19.0 by @MilesCranmer in https://github.com/MilesCranmer/PySR/pull/340
  • ~30% faster startup time on first search (https://github.com/MilesCranmer/SymbolicRegression.jl/releases/tag/v0.19.0)
• Let user know when compilation is taking place by @MilesCranmer in https://github.com/MilesCranmer/PySR/pull/341

Full Changelog: https://github.com/MilesCranmer/PySR/compare/v0.14.0...v0.14.1

What's Changed

• Added CLI to run pysr.install() to install Julia dependencies by @w2ll2am in https://github.com/MilesCranmer/PySR/pull/298
  • Let's you install PySR with python -m pysr install rather than python -c 'import pysr; pysr.install()'
  • This CLI also has other options available (precompilation, Julia project name, etc.)

New Contributors

• @w2ll2am made their first contribution in https://github.com/MilesCranmer/PySR/pull/298

Full Changelog: https://github.com/MilesCranmer/PySR/compare/v0.13.0...v0.14.0

What's Changed

• Test Julia 1.9 by @MilesCranmer in https://github.com/MilesCranmer/PySR/pull/329
• Automated update to backend: v0.18.0 by @MilesCranmer in https://github.com/MilesCranmer/PySR/pull/331

Backend changes

Diff since v0.17.1

• Overload ^ if user passes explicitly (MilesCranmer/SymbolicRegression.jl#201) (@MilesCranmer)
• Upgrade DynamicExpressions to 0.8; LossFunctions to 0.10 (MilesCranmer/SymbolicRegression.jl#206) (@github-actions[bot])
• Show expressions evaluated per second (MilesCranmer/SymbolicRegression.jl#209) (@MilesCranmer)
• Cache complexity of expressions whenever possible (MilesCranmer/SymbolicRegression.jl#210) (@MilesCranmer)

Full Changelog: https://github.com/MilesCranmer/PySR/compare/v0.12.3...v0.13.0