Migration Between Major Versions

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