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JAVA code

Case 1: Dealing with free arguments

import org.mariuszgromada.math.mxparser.*;
...
Argument x = new Argument("x = 1");
Argument y = new Argument("y = 2*pi");
Argument z = new Argument("z", 3);
Argument n = new Argument("n", 4);
		
Expression e = new Expression("n*( sin(x+y)-cos(y/z) )", x, y, z, n);
mXparser.consolePrintln("Res 1: " + e.getExpressionString() + " = " + e.calculate());

x.setArgumentValue(0);
z.setArgumentValue(4);
mXparser.consolePrintln("Res 2: " + e.getExpressionString() + " = " + e.calculate());

x.setArgumentValue(5);
mXparser.consolePrintln("Res 3: " + x.getArgumentName() + " = " + x.getArgumentValue());

Res 1: n*( sin(x+y)-cos(y/z) ) = 5.365883939231585
Res 2: n*( sin(x+y)-cos(y/z) ) = -1.2246467991473533E-15
Res 3: x = 5.0

Case 2: Defining dependent arguments

import org.mariuszgromada.math.mxparser.*;
...
Argument x = new Argument("x");		
Argument y = new Argument("y = x^2", x);
		
x.setArgumentValue(1);
mXparser.consolePrintln("Res 1: " + y.getArgumentName() + " = " + y.getArgumentValue());
		
x.setArgumentValue(2);
mXparser.consolePrintln("Res 2: " + y.getArgumentName() + " = " + y.getArgumentValue());
		
x.setArgumentValue(3);
mXparser.consolePrintln("Res 3: " + y.getArgumentName() + " = " + y.getArgumentValue());
		
Expression e = new Expression("x*y", x, y);
mXparser.consolePrintln("Res 4: " + e.getExpressionString() + " = " + e.calculate());

Res 1: y = 1.0
Res 2: y = 4.0
Res 3: y = 9.0
Res 4: x*y = 27.0

*** If you found the software useful donation is something you might consider 🙂 ***

Enjoy! 🙂

 

Best regards,

Mariusz Gromada

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