math_expressions 2.5.0

A library for parsing and evaluating mathematical expressions, supporting real numbers, vectors, and basic interval arithmetic.

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

2.5.0 - 2024-04-16

Added

• Add support for parsing variables containing digits (thanks alexander-zubkov)

Changed

• Drop support for Dart SDK versions below 3.0.0
• Refactor unit test suites and improve test coverage
• Switch from pedantic to the official Dart lint rules

2.4.0 - 2023-04-05

Added

• Add UnaryPlus operator (thanks jpnurmi)

Changed

• Improve evaluation of unary minus as an exponent of a power (thanks edhom)
• Use markdown LaTeX instead of images in README (thanks dvirberlo)

2.3.1 - 2022-05-30

Changed

• Evaluate roots written as powers correctly for negative bases (thanks edhom)

2.3.0 - 2021-12-21

Added

• Add factorial function (thanks Just-Learned-It)

Changed

• Switch from Travis CI to GitHub Actions
• Adopt Keep a Changelog format

2.2.0 - 2021-08-04

• Add algorithmic function that is bound to a Dart handler function, including parser support (thanks kamimark)

2.1.1 - 2021-05-02

• Fix inaccuracies in sin/cos/tan when using math.pi (machine pi) (thanks mbullington)

2.1.0 - 2021-03-17

• Bumped to stable release.

2.1.0-nullsafety.0 - 2021-03-12

• Drop support for Dart SDK versions below 2.12.0
• Migrate to null safety (thanks albertodev01)

2.0.2 - 2021-01-08

• Lower precedence of unary minus below power operator to match common mathematics conventions so that -x^y is parsed as -(x^y) instead of (-x)^y

2.0.1 - 2020-09-07

• Add ability to unbind variable names (by wdavies973)
• Fix parsing of ceil function (by pepsin)

2.0.0 - 2020-03-08

• Drop support for Dart SDK versions below 2.1.1
• Enable unnecessary_new lint rule
• Parser throws FormatException instead of StateError or ArgumentError for invalid input string
• Remove underscore syntax previously supported for unary minus
• Fix toString() parser compatibility for the following expressions:
  • Logarithm function: Change string representation from log_b(x) to log(b, x)
  • N-th root function: Change string representation from nrt_n(x) to nrt(n, x)
  • Exponential function: Change string representation from exp(x) to e(x)

1.1.1 - 2019-04-16

• Package health and maintenance cleanups

1.1.0 - 2019-04-16

• Drop support for Dart SDK versions below 2.0.0
• Add arcsin, arccos, arctan functions
• Fix floor and ceil functions
• Update examples and documentation
• Switch to pedantic analysis options

1.0.0 - 2018-08-11

• Add support for Dart 2.0
• Drop support for Dart SDK versions below 1.24.0
• Depend on vector_math 2.0.0 or newer

0.4.0 - 2018-08-10

• Last release to only support Dart 1.x
• Prepare for Dart 2.0
• Enable strong mode
• Analyzer and linter fixes
• Drop support for Dart SDK versions below 1.21.0

0.3.0 - 2016-07-09

• Rename Point3D to Point3
• Point3 now is a subtype of Vector3
• Add mod (%) operator and ceil, floor functions
• Fixing a few missed chain rules in derive

0.2.0+1 - 2015-12-30

• Depend on vector_math 1.4.4 or greater

0.2.0 - 2015-11-19

• Add support for basic vector operations
• Switch to using test instead of unittest package
• Warning: Depends on git version of vector_math as latest pub release is severely outdated

0.1.0 - 2014-07-19

• Add absolute value function (by markhats)
• Add sign function
• Improve test coverage
• Adapt string representation of unary minus to standard syntax

0.0.9 - 2014-03-30

• To create exponentials, use e(x) or e^x. Consequently, removed support for exp(x).
• Improve test coverage
• Update dependencies

0.0.8 - 2013-12-10

• Bring back standard syntax for unary minus: -5 works now. (by markhats)
• Add parser support for e^x additional to exp(x). (by markhats)

0.0.7 - 2013-11-09

• Introduce nested context/naming scopes
• Improve vector evaluation
• Add some missing methods
• Improve test coverage (custom and composite functions)
• Remove boilerplate code

0.0.6 - 2013-11-07

• Add compose operator for functions: Use & to conveniently create a CompositeFunction from two existing functions: expr = f & g;
• Improve documentation and dartdoc generation

0.0.5 - 2013-11-06

• Minor code cleanup
• Prepare for Dart 1.0

0.0.4 - 2013-10-11

• Fix handling of operator associativity
• Add support for default functions to parser
• Add support for unary minus to parser: Input with underscore. Instead of 2*-5 use 2*_5.

0.0.3 - 2013-10-09

• Add cli evaluator to examples
• Improve test coverage
• Fix bug in differentiation of Sin and Cos
• Remove support of unary minus in Parser

0.0.2 - 2013-10-07

• Improve test coverage
• Improve documentation
• Fix bug in simplification of Minus
• Fix bug in simplification of Times
• Implement evaluation of nth root

0.0.1+1 - 2013-10-06

• Improve documentation and examples

0.0.1 - 2013-10-04

• Initial release of standalone version