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v.5.0.4 (2022-05-22): Leonis – a major release: Implied Multiplication, Unicode Math Symbols, Additional Probability Distributions, Calculation Steps Register:

• Implied Multiplication, click to see usage example
• Unicode Math Symbols, click to see usage example
• Calculation Steps Register, click to see usage example
• An Attempt To Fix Expression String
• Student’s t-distribution: Probabilisty Density Function, Cumulative Distribution Function, Quantile Function
• Chi-Squared Distribution: Probabilisty Density Function, Cumulative Distribution Function, Quantile Function
• Minor Bug fixing: 259, 258, 252
• Regression tests refactoring
• License update

v.4.4.2 (2020-01-25): Gemoni – bugs fixing

• #200 System.OutOfMemoryException: Array dimensions exceeded supported range (#200)
• #199 cancelCurrentCalculation does not stop for some expressions (#199)

v.4.4.0 (2020-01-14): Gemoni – API improvement

Canonical rounding: Bye bye floating point arithmetic artifacts

ULP rounding is switched of as a default setting (can be enabled / disabled). As a default canonical rounding is switched on (can be disabled / enabled). New methods:

• mXparser.enableCanonicalRounding()
• mXparser.disableCanonicalRounding()
• mXparser.setCanonicalRounding(boolean)
• mXparser.checkIfCanonicalRounding

Argument extension – analogy to Function Extension

Now you can define user arguments implementing your own algorithm in source code.

Bugs fixed

• #168, #18 Exact special trigonometric values
• #192, #178 Logical operators precedence
• #172 “x + 4 * – 2”

v.4.3.3 (2019-01-27): Bug fix

• No Operator between Argumant and Parentheses #170

v.4.3.2 (2019-01-25): Nuget package fix

• Could not load file or assembly MathParser.org-mXparser #171

v.4.3.0 (2019-01-19): Caprica – API improvement

Cancel ongoing calculation

• mXparser.cancelCurrentCalculation()
• mXparser.resetCancelCurrentCalculationFlag();

Set default options

• mXparser.setDefaultOptions()

User defined constants / units

• constant name can be surrounded by square bracket, i.e. [const]
• Expression.getMissingUserDefinedUnits()

Bug fixing

• #153, #162 Endless Loop
• #164 PrimeCache out of memory – handling error / exception

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

• Argument.checkSyntax() #145
• Endless loop with factorial #136
• StringIndexOutOfBoundsException asking for tokens of empty expression #135
• Function.checkSyntax() always returns true #111
• Syntax for unary complement #114
• Iterative operators descending sequence #119
• checkSyntax() bug #80
• Very very very long processing time of gcd #91
• Priorities of “if”, “iff” and other calculus operations #82

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

v.4.1.1 (2017-07-28): Aeries – checkSyntax() bug fixing

• Fixed: checkSyntax() returns true “already checked no errors” #75

v.4.1.0 (2017-07-09): Aeries – Major update

Various numeral systems

• Binary numbers literals
• Octal numbers literals
• Hexadecimal numbers literals
• Number literals with base between 1 and 36
• base(b, digit1, …, digitn) function to generate numbers in any given base

Leading zeros support

• 0001
• 0001.12e10
• …

Working with digits

• ndig(number, targetBase) function – number of digits – specified numeral system base
• ndig10(number) function – number of digits – base 10
• dig(number, targetBase, position) – digit at position – specified numeral system base
• dig10(number, position) – digit at position – base 10

Prime factorization

• nfact(number) – number of prime factors
• factval(number, factorId) – factor value
• factexp(number, factorId) – factor exponent

Not-a-Number

• [NaN] symbol
• isNaN(x) function
• coalesce(a1,…,an) function – first non-NaN value

Statistics

• med(a1, a2, …, an) – sample median
• mode(a1, a2, …, an) – sample mode

Boolean logic

• [true] symbol
• [false] symbol
• or(a1,…an) – variadic or
• and(a1,…an) – variadic and
• xor(a1,…an) – variadic xor

Other functions

• root(order, number) – root + support for negative numbers and odd-order
• arcsec(x) – inverse trigonometric secant
• arccsc(x) – inverse trigonometric cosecant
• ndist(v1, v2, … vn) – number of distinct values
• argmin(v1, v2, … vn) – index of minimum
• argmax(v1, v2, … vn) – index of maximum

New operator

• % support (i.e. 2%, x%)

Calculus

• der( f(x), x, x0 ) – alternative syntax for derivative (no need to define x as argument)

Built-in tokens

• Option to override built-in tokens
• Possibility to remove built-in tokens
• Possibility to change built-in token
• Key words: syntax + since
• Get key words list

Working with expression tokens

• Get missing user defined arguments
• Get missing user defined functions

Bugs fixed

• Dependent arguments and StackOverflowError #35 (introduction of recursion calls counter)
• FunctionExtension.calculate #32

v.4.0.0 (2017-03-27): Major update: Bitwise Operators, Numbers in scientific notation, Units, Physical & Astronomical Constants, Equations solving via finding function root, Better tokens handling, Function Extensions – possibility of using your own implementation, Bugs fixed!

Bitwise Operators

• @~ – Bitwise unary complement
• @& – Bitwise AND
• @^ – Bitwise exclusive OR
• @| – Bitwise inclusive OR
• @<< – Signed left shift
• @>> – Signed right shift

Numbers in scientific notation

• 1.2e10
• 1.2e-10
• 1.2e+10
• 1.2E10
• 1.2E-10
• 1.2E+10
• …

Units

• [%] – <Ratio, Fraction> Percentage = 0.01
• [%%] – <Ratio, Fraction> Promil, Per mille = 0.001
• [Y] – Septillion / Yotta = 10^24
• [sept] – Septillion / Yotta = 10^24
• [Z] – Sextillion / Zetta = 10^21
• [sext] – Sextillion / Zetta = 10^21
• [E] – Quintillion / Exa = 10^18
• [quint] – Quintillion / Exa = 10^18
• [P] – Quadrillion / Peta = 10^15
• [quad] – Quadrillion / Peta = 10^15
• [T] – Trillion / Tera = 10^12
• [tril] – Trillion / Tera = 10^12
• [G] – Billion / Giga = 10^9
• [bil] – Billion / Giga = 10^9
• [M] – Million / Mega = 10^6
• [mil] – Million / Mega = 10^6
• [k] – Thousand / Kilo = 10^3
• [th] – Thousand / Kilo = 10^3
• [hecto] – Hundred / Hecto = 10^2
• [hund] – Hundred / Hecto = 10^2
• [deca] – Ten / Deca = 10
• [ten] – Ten / Deca = 10
• [deci] – Tenth / Deci = 0.1
• [centi] – Hundredth / Centi = 0.01
• [milli] – Thousandth / Milli = 0.001
• [mic] – Millionth / Micro = 10^-6
• [n] – Billionth / Nano = 10^-9
• [p] – Trillionth / Pico = 10^-12
• [f] – Quadrillionth / Femto = 10^-15
• [a] – Quintillionth / Atoo = 10^-18
• [z] – Sextillionth / Zepto = 10^-21
• [y] – Septillionth / Yocto = 10^-24
• [m] – Metre / Meter (m=1)
• [km] – Kilometre / Kilometer (m=1)
• [cm] – Centimetre / Centimeter (m=1)
• [mm] – Millimetre / Millimeter (m=1)
• [inch] – Inch (m=1)
• [yd] – Yard (m=1)
• [ft] – Feet (m=1)
• [mile] – Mile (m=1)
• [nmi] – Nautical mile (m=1)
• [m2] – Square metre / Square meter (m=
• [cm2] – Square centimetre / Square cent
• [mm2] – Square millimetre / Square mill
• [are] – Are (m=1)
• [ha] – Hectare (m=1)
• [acre] – Acre (m=1)
• [km2] – Square kilometre / Square kilom
• [mm3] – Cubic millimetre / Cubic mill
• [cm3] – Cubic centimetre / Cubic cent
• [m3] – Cubic metre / Cubic meter (m=
• [km3] – Cubic kilometre / Cubic kilom
• [ml] – Millilitre / Milliliter (m=1)
• [l] – Litre / Liter (m=1)
• [gall] – Gallon (m=1)
• [pint] – Pint (m=1)
• [s] – Second (s=1)
• [ms] – Millisecond (s=1)
• [min] – Minute (s=1)
• [h] – Hour (s=1)
• [day] – Day (s=1)
• [week] – Week (s=1)
• [yearj] – Julian year = 365.25 days (s=1)
• [kg] – Kilogram (kg=1)
• [gr] – Gram (kg=1)
• [mg] – Milligram (kg=1)
• [dag] – Decagram (kg=1)
• [t] – Tonne (kg=1)
• [oz] – Ounce (kg=1)
• [lb] – Pound (kg=1)
• [b] – Bit (bit=1)
• [kb] – Kilobit (bit=1)
• [Mb] – Megabit (bit=1)
• [Gb] – Gigabit (bit=1)
• [Tb] – Terabit (bit=1)
• [Pb] – Petabit (bit=1)
• [Eb] – Exabit (bit=1)
• [Zb] – Zettabit (bit=1)
• [Yb] – Yottabit (bit=1)
• [B] – Byte (bit=1)
• [kB] – Kilobyte (bit=1)
• [MB] – Megabyte (bit=1)
• [GB] – Gigabyte (bit=1)
• [TB] – Terabyte (bit=1)
• [PB] – Petabyte (bit=1)
• [EB] – Exabyte (bit=1)
• [ZB] – Zettabyte (bit=1)
• [YB] – Yottabyte (bit=1)
• [J] – Joule (m=1, kg=1, s=1)
• [eV] – Electronovolt (m=1, kg=1, s=1
• [keV] – Kiloelectronovolt (m=1, kg=1,
• [MeV] – Megaelectronovolt (m=1, kg=1,
• [GeV] – Gigaelectronovolt (m=1, kg=1,
• [TeV] – Teraelectronovolt (m=1, kg=1,
• [m/s] – Metre / Meter per second (m=1,
• [km/h] – Kilometre / Kilometer per hour
• [mi/h] – Mile per hour (m=1, s=1)
• [knot] – Knot (m=1, s=1)
• [m/s2] – Metre / Meter per squar
• [km/h2] – Kilometre / Kilometer p
• [mi/h2] – Mile per square hour (m
• [rad] – Radian (rad=1)
• [deg] – Degree of arc (rad=1)
• [‘] – Minute of arc (rad=1)
• [”] – Second of arc (rad=1)

Physical Constants

• – Light speed in vacuum [m/s] (m=1, s=1)
• [G.] – Gravitational constant (m=1, kg=1, s=1)]
• [g] – Gravitational acceleration on Earth [m/s^2] (m=1, s=1)
• [hP] – Planck constant (m=1, kg=1, s=1)
• [h-] – Reduced Planck constant / Dirac constant (m=1, kg=1, s=1)]
• [lP] – Planck length [m] (m=1)
• [mP] – Planck mass [kg] (kg=1)
• [tP] – Planck time [s] (s=1)

Astronomical Constants

• [ly] – Light year [m] (m=1)
• [au] – Astronomical unit [m] (m=1)
• [pc] – Parsec [m] (m=1)
• [kpc] – Kiloparsec [m] (m=1)
• [Earth-R-eq – ]Earth equatorial radius [m] (m=1)
• [Earth-R-po] – Earth polar radius [m] (m=1)
• [Earth-R] – Earth mean radius (m=1)
• [Earth-M] – Earth mass [kg] (kg=1)
• [Earth-D] – Earth-Sun distance – semi major axis [m] (m=1)
• [Moon-R] – Moon mean radius [m] (m=1)
• [Moon-M] – Moon mass [kg] (kg=1)
• [Moon-D] – Moon-Earth distance – semi major axis [m] (m=1)
• [Solar-R] – Solar mean radius [m] (m=1)
• [Solar-M] – Solar mass [kg] (kg=1)
• [Mercury-R] – Mercury mean radius [m] (m=1)
• [Mercury-M] – – Mercury mass [kg] (kg=1)
• [Mercury-D]Mercury-Sun distance – semi major axis [m] (m=1)
• [Venus-R] – Venus mean radius [m] (m=1)
• [Venus-M] – Venus mass [kg] (kg=1)
• [Venus-D] – Venus-Sun distance – semi major axis [m] (m=1)
• [Mars-R] – Mars mean radius [m] (m=1)
• [Mars-M] – Mars mass [kg] (kg=1)
• [Mars-D] – Mars-Sun distance – semi major axis [m] (m=1)
• [Jupiter-R] – Jupiter mean radius [m] (m=1)
• [Jupiter-M] – Jupiter mass [kg] (kg=1)
• [Jupiter-D] – Jupiter-Sun distance – semi major axis [m] (m=1)
• [Saturn-R] – Saturn mean radius [m] (m=1)
• [Saturn-M] – Saturn mass [kg] (kg=1)
• [Saturn-D] – Saturn-Sun distance – semi major axis [m] (m=1)
• [Uranus-R] – Uranus mean radius [m] (m=1)
• [Uranus-M] – Uranus mass [kg] (kg=1)
• [Uranus-D] – Uranus-Sun distance – semi major axis [m] (m=1)
• [Neptune-R] – Neptune mean radius [m] (m=1)
• [Neptune-M] – Neptune mass [kg] (kg=1)
• [Neptune-D] – Neptune-Sun distance – semi major axis [m] (m=1)

Equations solving via finding function root

• solve( f(x), x, a, b ) – solving f(x) = 0

Better tokens handling

• Better handling of invalid / not known tokens
• Looks like functionality

Function Extensions – possibility of using your own implementation

• FunctionExtension interface + new constructor in Function class

Bugs fixed

• Exception thrown by getCopyOfInitialTokens() #21
• System.format.exception – system.IO.EndOfStreamException #20
• Expression relating factorial “!” cause the application to hang #17
• Negative sign missing when is right of operators #16
• Negative in if statement #12
• Speed when debugging #11
• User defined arguments ending in e #10

New regression tests – current tests coverage:

• 622 expression related tests
• 114 syntax related tests
• 30 api related tests
• 20 performance tests

Enjoy 🙂

Nuget – Package Manager

Install-Package MathParser.org-mXparser -Version 5.2.1

Nuget – .NET CLI

dotnet add package MathParser.org-mXparser --version 5.2.1

Nuget – Package Reference

<PackageReference Include="MathParser.org-mXparser" Version="5.2.1"/>

Maven – Dependency

<dependency>
<groupid>org.mariuszgromada.math</groupid>
<artifactid>MathParser.org-mXparser</artifactid>
<version>5.2.1</version>
</dependency>

Maven – Gradle

implementation 'org.mariuszgromada.math:MathParser.org-mXparser:5.2.1'

Maven – Gradle (Kotlin)

implementation("org.mariuszgromada.math:MathParser.org-mXparser:5.2.1")

GitHub

git clone https://github.com/mariuszgromada/MathParser.org-mXparser

OTHER DOWNLOAD OPTIONS

Download latest release – v.5.2.1 Orion: .NET bin onlyDownload latest release – v.5.2.1 Orion: JAVA bin onlyDownload latest release – v.5.2.1 Orion: bin + doc

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SOURCE CODE

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