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GeezerVison is showing en.wikipedia.org — mXparser - Wikipedia
mXparser is an open-source mathematical expressions parser/evaluator providing abilities to calculate various expressions at a run time.[1] Expressions definitions are given as plain text, then verified in terms of grammar / syntax, finally calculated. Library source code is maintained separately for Java and C#, providing the same API for Java/JVM, Android, .NET and Mono (Common Language Specification Compliant). Main features / usage examplesmXparser delivers functionalities such as: basic calculations, implied multiplication, built-in constants and functions, numerical calculus operations, iterated operators, user defined constants, user defined functions, user defined recursion, Unicode mathematical symbols support. Basic operatorsSource:[2] mXparser supports basic operators, such as: addition '+', subtraction '-', multiplication '*', division '/', factorial '!', power '^', modulo '#'. Expression e = new Expression("2+3/(4+5)^4"); double v = e.calculate(); Implied multiplicationSource:[2] Expression e = new Expression("2(3+4)3"); double v = e.calculate(); Expression e = new Expression("2pi(3+4)2sin(3)e"); double v = e.calculate(); Source:[2] It is possible to combine typical expressions with binary relations (such as: greater than '>', less than '<', equality '=', inequality '<>', greater or equal '>=', lower or equal '<='), as each relation evaluation results in either '1' for true outcome, or '0' for false. Expression e = new Expression("(2<3)+5"); double v = e.calculate(); Source:[2] Boolean logic also operates assuming equivalence of '1 as true' and '0 as false'. Supported Boolean operators include: AND conjunction, OR disjunction, NAND Sheffer stroke, NOR, XOR Exclusive OR, IMP Implication, CIMP Converse implication, NIMP Material nonimplication, CNIMP Converse nonimplication, EQV Logical biconditional, Negation. Expression e = new Expression("1 --> 0"); double v = e.calculate(); Built-in mathematical functionsSource:[2] Supported common mathematical functions (unary, binary and variable number of arguments), including: trigonometric functions, inverse trigonometric functions, logarithm functions, exponential function, hyperbolic functions, Inverse hyperbolic functions, Bell numbers, Lucas numbers, Stirling numbers, prime-counting function, exponential integral function, logarithmic integral function, offset logarithmic integral, binomial coefficient and others. Expression e = new Expression("sin(0)+ln(2)+log(3,9)"); double v = e.calculate(); Expression e = new Expression("min(1,2,3,4)+gcd(1000,100,10)"); double v = e.calculate(); Expression e = new Expression("if(2<1, 3, 4)"); double v = e.calculate(); Expression e = new Expression("iff(2<1, 1; 3<4, 2; 10<2, 3; 5<10, 4)"); double v = e.calculate(); Built-in math constantsSource:[2] Built-in mathematical constants, with high precision. Expression e = new Expression("sin(pi)+ln(e)"); double v = e.calculate(); Iterated operatorsSource:[2] Iterated summation and product operators. Expression e = new Expression("sum(i, 1, 10, ln(i))"); double v = e.calculate(); Expression e = new Expression("prod(i, 1, 10, sin(i))"); double v = e.calculate(); Numerical differentiation and integrationSource:[2] mXparser delivers implementation of the following calculus operations: differentiation and integration. Expression e = new Expression("der( sin(x), x )"); double v = e.calculate(); Expression e = new Expression("int( sqrt(1-x^2), x, -1, 1)"); double v = e.calculate(); Prime numbers supportSource:[2] Expression e = new Expression("ispr(21)"); double v = e.calculate(); Expression e = new Expression("Pi(1000)"); double v = e.calculate(); Source:[2] Expression e = new Expression("√2"); double v = e.calculate(); Expression e = new Expression("∜16 + ∛27 + √16"); double v = e.calculate(); Expression e = new Expression("∑(i, 1, 5, i^2)"); double v = e.calculate(); Elements defined by userLibrary provides API for creation of user-defined objects, such as: constants, arguments, functions. User-defined constantsSource:[3] Constant t = new Constant("t = 2*pi"); Expression e = new Expression("sin(t)", t); double v = e.calculate(); User-defined argumentsSource:[3] Argument x = new Argument("x = 5"); Argument y = new Argument("y = 2*x", x); Expression e = new Expression("sin(x)+y", x, y); double v = e.calculate(); User-defined functionsSource:[3] Function f = new Function("f(x, y) = sin(x)+cos(y)"); Expression e = new Expression("f(1,2)", f); double v = e.calculate(); User-defined variadic functionsSource:[3] Function f = new Function("f(...) = sum( i, 1, [npar], par(i) )"); Expression e = new Expression("f(1,2,3,4)", f); double v = e.calculate(); User-defined recursionSource:[3] Function fib = new Function("fib(n) = iff( n>1, fib(n-1)+fib(n-2); n=1, 1; n=0, 0 ) )"); Expression e = new Expression("fib(10)", fib); double v = e.calculate(); RequirementsSource:[3] DocumentationmXparser - source codeSee alsoReferencesExternal linksRetrieved from "https://en.wikipedia.org/w/index.php?title=MXparser&oldid=1374753770" | ||||||||||||||||||||
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