“if” and “iff” functions

TO SUPPORT MY WORK, ORDER A COMMERCIAL LICENSE
THANK YOU!

Tutorial Math Collection API spec Download

Below is the code for JAVA, the code for C# is almost identical.

Case 1: Mechanics of the if function

import org.mariuszgromada.math.mxparser.*;
...
Expression e1 = new Expression("if(2<3, 1, 2)");
Expression e2 = new Expression("if(4<3, 1, 2)");
mXparser.consolePrintln("Res 1: " + e1.getExpressionString() + " = " + e1.calculate());
mXparser.consolePrintln("Res 2: " + e2.getExpressionString() + " = " + e2.calculate());
[mXparser-v.5.0.0] Res 1: if(2<3, 1, 2) = 1.0
[mXparser-v.5.0.0] Res 2: if(4<3, 1, 2) = 2.0

Case 2: “if” function and arguments

import org.mariuszgromada.math.mxparser.*;
...
Argument x = new Argument("x = 2");
Expression e = new Expression("if(x<3, x+2, x-2)", x);
mXparser.consolePrintln("Res 1: " + " x = " + x.getArgumentValue() + ", " + e.getExpressionString() + " = " + e.calculate());
x.setArgumentValue(4);
mXparser.consolePrintln("Res 2: " + " x = " + x.getArgumentValue() + ", " + e.getExpressionString() + " = " + e.calculate());
[mXparser-v.5.0.0] Res 1:  x = 2.0, if(x<3, x+2, x-2) = 4.0
[mXparser-v.5.0.0] Res 2:  x = 4.0, if(x<3, x+2, x-2) = 2.0

Case 3: “if” function in user defined function

import org.mariuszgromada.math.mxparser.*;
...
Function f = new Function("f(x) = if(x<3, x+2, x-2)");
Expression e1 = new Expression("f(2)", f);
Expression e2 = new Expression("f(4)", f);
mXparser.consolePrintln("Res 1: " + e1.getExpressionString() + " = " + e1.calculate());
mXparser.consolePrintln("Res 2: " + e2.getExpressionString() + " = " + e2.calculate());
[mXparser-v.5.0.0] Res 1: f(2) = 4.0
[mXparser-v.5.0.0] Res 2: f(4) = 2.0

Case 4: Mechanics of the “iff” function

import org.mariuszgromada.math.mxparser.*;
...
Argument x = new Argument("x = 0.5");
Expression e = new Expression("iff(x<1, 1; x<2, 2; x<3, 3)", x);
mXparser.consolePrintln("Res 1: " + " x = " + x.getArgumentValue() + ", " + e.getExpressionString() + " = " + e.calculate());
x.setArgumentValue(1.5);
mXparser.consolePrintln("Res 2: " + " x = " + x.getArgumentValue() + ", " + e.getExpressionString() + " = " + e.calculate());
x.setArgumentValue(2.5);
mXparser.consolePrintln("Res 3: " + " x = " + x.getArgumentValue() + ", " + e.getExpressionString() + " = " + e.calculate());
x.setArgumentValue(3.5);
mXparser.consolePrintln("Res 4: " + " x = " + x.getArgumentValue() + ", " + e.getExpressionString() + " = " + e.calculate());
[mXparser-v.5.0.0] Res 1:  x = 0.5, iff(x<1, 1; x<2, 2; x<3, 3) = 1.0
[mXparser-v.5.0.0] Res 1:  x = 1.5, iff(x<1, 1; x<2, 2; x<3, 3) = 2.0
[mXparser-v.5.0.0] Res 1:  x = 2.5, iff(x<1, 1; x<2, 2; x<3, 3) = 3.0
[mXparser-v.5.0.0] Res 1:  x = 3.5, iff(x<1, 1; x<2, 2; x<3, 3) = NaN

Case 5: “iff” function is not limited in number of cases

import org.mariuszgromada.math.mxparser.*;
...
Argument x = new Argument("x = 0.5");
Expression e = new Expression("iff(x<1, 1; x<2, 2; x<3, 3; x<4, 4; x<5, 5)", x);
mXparser.consolePrintln("Res 1: " + " x = " + x.getArgumentValue() + ", " + e.getExpressionString() + " = " + e.calculate());
x.setArgumentValue(1.5);
mXparser.consolePrintln("Res 2: " + " x = " + x.getArgumentValue() + ", " + e.getExpressionString() + " = " + e.calculate());
x.setArgumentValue(2.5);
mXparser.consolePrintln("Res 3: " + " x = " + x.getArgumentValue() + ", " + e.getExpressionString() + " = " + e.calculate());
x.setArgumentValue(3.5);
mXparser.consolePrintln("Res 4: " + " x = " + x.getArgumentValue() + ", " + e.getExpressionString() + " = " + e.calculate());
x.setArgumentValue(4.5);
mXparser.consolePrintln("Res 5: " + " x = " + x.getArgumentValue() + ", " + e.getExpressionString() + " = " + e.calculate());
[mXparser-v.5.0.0] Res 1:  x = 0.5, iff(x<1, 1; x<2, 2; x<3, 3; x<4, 4; x<5, 5) = 1.0
[mXparser-v.5.0.0] Res 2:  x = 1.5, iff(x<1, 1; x<2, 2; x<3, 3; x<4, 4; x<5, 5) = 2.0
[mXparser-v.5.0.0] Res 3:  x = 2.5, iff(x<1, 1; x<2, 2; x<3, 3; x<4, 4; x<5, 5) = 3.0
[mXparser-v.5.0.0] Res 4:  x = 3.5, iff(x<1, 1; x<2, 2; x<3, 3; x<4, 4; x<5, 5) = 4.0
Nuget
Install-Package MathParser.org-mXparser -Version 5.0.2
Maven
<dependency>
<groupid>org.mariuszgromada.math</groupid>
<artifactid>MathParser.org-mXparser</artifactid>
<version>5.0.2</version>
</dependency>
Gradle
implementation 'org.mariuszgromada.math:MathParser.org-mXparser:5.0.2'
Gradle (Kotlin)
implementation("org.mariuszgromada.math:MathParser.org-mXparser:5.0.2")
GitHub
git clone https://github.com/mariuszgromada/MathParser.org-mXparser
OTHER DOWNLOAD OPTIONS

Download latest release – v.5.0.2 Leonis: bin + docDownload latest release – v.5.0.2 Leonis: bin only, includes separate binaries for various .NET platforms and Java versions

NEWS FROM MATHPARSER.ORG
SOURCE CODE

Source code .zipSource code .tar.gz
View on GitHubMathSpace.pl

DONATION
Did you find the software useful?
Please consider donation 🙂
DONATE