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MathParser.org-mXparser - v.4.2.0 2018-07-16 16.3 MB
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v.4.2.0 (2018-07-15): Aquaria - Major release

Broader types of decimal number literals

  • No leading zero, i.e.: .2, .312, -.21

Fraction as number literals

  • 1_2 is recognized as 1/2
  • 2_3_4 is recognized as 2 + 3/4
  • 17_5 is recognized as 17/5
  • Just use Expression e = new Expression("2_3_2 + 1_2")

Double to fraction conversion

  • mXparser.toFraction(double value) - double[]
  • mXparser.toMixedFraction(double value) - double[]
  • mXparser.fractionToString(double[] fraction) - String
  • mXparser.toFractionString(double value) - String
  • mXparser.toMixedFractionString(double value) - String

Disable / enable almost int rounding

  • mXparser.enableAlmostIntRounding()
  • mXparser.disableAlmostIntRounding()
  • mXparser.checkIfAlmostIntRounding()
  • mXparser.getEpsilon()
  • mXparser.setEpsilon()

Variadic user defined functions

  • Function f = new Function("f(...) = sum(i, 1, [npar], par(i)^2 )");
  • [npar] - number of available parameters
  • par(i) - parameter value
  • body extended is supported

New special functions

  • Gamma(x) - Gamma special function Γ(s)
  • LambW0(x) - Lambert-W special function, principal branch 0, also called the omega function or product logarithm
  • LambW1(x) - Lambert-W special function, branch -1, also called the omega function or product logarithm
  • sgnGamma(x) - Signum of Gamma special function, Γ(s)
  • logGamma(x) - Log Gamma special function, lnΓ(s)
  • diGamma(x) - Digamma function as the logarithmic derivative of the Gamma special function, ψ(x)
  • GammaL(s,x) - Lower incomplete gamma special function, γ(s,x)
  • GammaU(s,x) - Upper incomplete Gamma special function, Γ(s,x)
  • GammaP(s,x), GammaRegL(s,x) - Lower regularized P gamma special function, P(s,x)
  • GammaQ(s,x), GammaRegU(s,x) - Upper regularized Q Gamma special function, Q(s,x)
  • Beta(x,y) - The Beta special function B(x,y), also called the Euler integral of the first kind
  • logBeta(x,y) - The Log Beta special function ln B(x,y), also called the Log Euler integral of the first kind, ln B(x,y)
  • BetaInc(x,a,b) - The incomplete beta special function B(x; a, b), also called the incomplete Euler integral of the first kind
  • BetaI(x,a,b), BetaReg(x,a,b) - The regularized incomplete beta (or regularized beta) special function I(x; a, b), also called the regularized incomplete Euler integral of the first kind

Degrees / Radians mode for trigonometrix

  • mXparser.setDegreesMode()
  • mXparser.setRadiansMode()
  • mXparser.checkIfDegreesMode()
  • mXparser.checkIfRadiansMode()

New operator - Tetration

  • a^^n is recognized as a^a^a...^a - n times

Bugs fixed

Other framework support (binaries)

  • .NET Core: 2.0, 2.1
  • .NET Standard: 2.0
  • .NET Framework: 4.7, 4.7.2
  • JAVA: 1.9, 1.10

New regression tests - current tests coverage:

  • 1155 expression related tests
  • 245 syntax related tests
  • 65 API related tests
  • 20 performance tests

https://github.com/mariuszgromada/MathParser.org-mXparser/milestone/2

Enjoy :-)

Source: README.md, updated 2018-07-16