math-php

New Features

• NumberTheory\Integer isPrime

New Features

• Distance chebyshev

Improvements

• Internal build CI/CD improvements

Improvements

• Internal improvements to improve conformance with static analysis tools

New Features

• Matrix rowAddVector
• Matrix columnAddVector

Improvements

• Better error handling and exception message in Sequence\NonIntenger::hyperharmonic
• Internal code improvements to conform to static analysis checks

Backwards Incompatible Changes

• Helper method names changed (public abstract methods but not part of published interface)
  • NumericalDifferentiation::isTargetInPoints changed to assertTargetInPoints
  • NumericalDifferentiation::isSpacingConstant changed to assertSpacingConstant

Improvements

• Improved algorithm for regularizedIncompleteBeta: Addresses issue 458
• Issue 456: Improved PHPDoc blocks: Changed "number" to "int|float"
• Added PHP 8.2 for CI test target

v2.6.0 - 2022-04-10

Improvements

• Average::truncatedMean behavior at 50% trim made consistent
• PHP 8.1 compatibility improvements

Backwards Incompatible Changes

• Average::truncatedMean throws exception if trim percent greater than 50% rather than error or unpredictable results.

New Features

• Special function logbeta
• Special function logGamma
• Special function logGammaCorr
• Special function stirlingError

Improvements

• Improvements in StudentT continuous distribution
• Improvements in special function gamma
• Improvements in special function beta

Bug Fixes

• Issue 393 (regularizedIncompleteBeta NAN)
• Issue 429 (Linear regression CI division by zero)

New Features

• Complex Exponential (exp)
• Complex Exponentiation (pow)
• Zipf's Law Discrete Distribution
• Generalized harmonic non-integer sequence

Improvements

• Fixed Complex polarForm to compute the right values
• Fixed hyperharnomic non-integer sequence. Previously was computing the wrong thing
• Fixed how ArbitraryInterger handles pow of negative exponents

Backwards Incompatible Changes

• Complex polarForm now returns an array rather than a Complex number, as the Complex return was incorrect
• Interface to hyperharmonic non-integer sequence changed due to previous implementation being incorrect

New Features

• Matrix SVD (Singular Value Decomposition)
• Polynomial companion matrix

New Features

• PLS (Partial Least Squares Regression)

Improvements

• Add custom __debugInfo to NumericMatrix

New Features

• Quaternion

New Features

• Matrix Improvements
  • walk method to map a function to all values without mutation or returning a value
  • MatrixFactory creates more matrix types
  • MatrixFactory::createNumeric to create NumericMatrix types
  • MatrixFactory::createFromRowVector
  • MatrixFactory::createFromColumnVector
  • Internal ObjectMatrix improvements
    • Add trace
    • Add scalarMultiply
  • Add initial ComplexMatrix
• Sample data People

Improvements

• Bug fixes
  • Issue 414 fixed - PCA/Eigenvalue convergence
  • Issue 413 fixed - matrix solve with singular matrix using RREF

Migration - Upgrading to v2.0 from v1.0

• PHP minimum version now 7.2 (was 7.0)
• Deprecated code removed (backwards-incompatible change)
  • MathPHP\Statistics\Distance::kullbackLeiblerDivergence removed (Use MathPHP\Statistics\Divergence::kullbackLeibler instead)
  • MathPHP\Statistics\Distance::jensenShannonDivergence removed (Use MathPHP\Statistics\Divergence::jensenShannon instead)
  • Matrix Decompositions no longer implement \ArrayAccess interface to access decomposition matrixes. Use properties instead.
    • MathPHP\LinearAlgebra\Decomposition\Cholesky
      • $cholesky['L'], $cholesky['Lᵀ'], $cholesky['LT'] removed, use $cholesky->L, $cholesky->Lᵀ, $cholesky->LT instead.
    • MathPHP\LinearAlgebra\Decomposition\Crout
      • $crout['L'], $crout['U'] removed, use $crout->L, $crout->U instead.
    • MathPHP\LinearAlgebra\Decomposition\LU
      • $LU['L'], LU['U'], LU['P'] removed, use $LU->L, $LU->U, $LU->P instead.
    • MathPHP\LinearAlgebra\Decomposition\QR
      • $QR['Q'], $QR['R'] removed, use $QR->Q, $QR->R instead.
• Methods renamed (backwards-incompatible change)
  • MathPHP\Statistics\Distance::bhattacharyyaDistance renamed to MathPHP\Statistics\Distance::bhattacharyya
  • MathPHP\Statistics\Distance::hellingerDistance renamed to MathPHP\Statistics\Distance::hellinger
• Moved Functionality (backwards-incompatible change)
  • MathPHP\Functions\Polynomial moved to MathPHP\Expression\Polynomial
  • MathPHP\Functions\Piecewise moved to MathPHP\Expression\Piecewise
• Matrix internal refactoring
  • Note: These changes will not affect any client code as long as matrices were created using MatrixFactory.
  • Matrix is not a base abstract class for all matrix classes to extend
  • Matrix renamed NumericMatrix
  • Matrix base method createZeroValue
    • Use case is various ObjectMatrix classes that implement ObjectArithmetic
  • RowVector removed. Use MatrixFactory::createFromRowVector instead
  • ColumnVector removed. Use MatrixFactory::createFromColumnVector instead

Improvements

• Bugfix (Issue 413): Matrix solve with singular matrix using RREF
• Bugfix (Issue 414): PCA/Eigenvalue convergence

Improvements

• Bugfix (Issue 356): Fix Finance IRR NANs

New Features

• Vector min and max
• Arithmetic isqrt (integer square root)

Improvements

• Remove Travis CI (Moved CI to Github Actions in v1.8.0 release)
• Rearrange non-code files

Improvements

• Improve permutations algorithm to be more efficient and more numerically stable
• Qualify PHP function names with root namespace
• Move CI to Github Actions

New Features

• Algebra linear equation of one variable
• Rational number inverse
• Rational number pow

Improvements

• Improve combinations algorithm to be more efficient and more numerically stable
• Internal Matrix class reorganization

New Features

• Special function regularized lower incomplete gamma
• Cereal sample data set

Improvements

• Define boundary condition for lower incomplete gamma function

v1.5.0

New Features

• Matrix LU solve
• Matrix QR solve

Improvements

• Bugfix (Issue 386) Matrix solve improvements
• Matrix solve has optional method parameter to force a solve method
• Bugfix ArbitraryInteger multiplication sign not taken into account

New Features

• Multivariate Regular Grid Interpolation
• Jensen-Shannon Distance
• Canberra Distance
• Search Sorted
• Search ArgMax
• Search NanArgMax
• Search ArgMin
• Serach NanArgMin
• Search NonZero

Improvements

• Divergence factored out of Distance into new Divergence class

Backwards Incompatible Changes

• Legacy Distance divergences marked as deprecated (To be removed in v2.0.0)