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Tutorial Math Collection API spec Download
Below is the code for JAVA, the code for C# is almost identical.
Case 1: Removing built-in tokens
import org.mariuszgromada.math.mxparser.*;
...
/*
* Removing built-in tokens methods:
*
* mXparser.removeBuiltinTokens(String... tokens)
* mXparser.unremoveBuiltinTokens(String... tokens)
* mXparser.unremoveAllBuiltinTokens()
* mXparser.getBuiltinTokensToRemove()
*/
Expression e;
/*
* Example 1: Before tokens removal
*/
e = new Expression("sin(pi)+cos(pi)");
e.checkSyntax();
mXparser.consolePrintln("*** Example 1: Before tokens removal");
mXparser.consolePrintln("\n\n" + e.getErrorMessage());
/*
* Example 2: Removing "sin", "cos" tokens
*/
mXparser.removeBuiltinTokens("sin", "cos");
e = new Expression("sin(pi)+cos(pi)");
e.checkSyntax();
mXparser.consolePrintln("*** Example 2: Removing \"sin\", \"cos\" tokens");
mXparser.consolePrintln("\n\n" + e.getErrorMessage());
/*
* Example 3: Printing removed built-in tokens
*/
mXparser.consolePrint("*** Example 4: Printing removed built-in tokens : ");
for (String t : mXparser.getBuiltinTokensToRemove() )
mXparser.consolePrint(t + ", ");
mXparser.consolePrintln();
mXparser.consolePrintln();
/*
* Example 4: Un-removing built-in token
*/
mXparser.unremoveBuiltinTokens("cos");
e.checkSyntax();
mXparser.consolePrintln("*** Example 4: Un-removing built-in token");
mXparser.consolePrintln("\n\n" + e.getErrorMessage());
/*
* Example 5: Un-removing all built-in token
*/
mXparser.unremoveAllBuiltinTokens();
e.checkSyntax();
mXparser.consolePrintln("*** Example 5: Un-removing all built-in token");
mXparser.consolePrintln("\n\n" + e.getErrorMessage());
[mXparser-v.5.0.0] *** Example 1: Before tokens removal [mXparser-v.5.0.0] [sin(pi)+cos(pi)] checking ... [sin(pi)+cos(pi)] no errors. [mXparser-v.5.0.0] *** Example 2: Removing "sin", "cos" tokens [mXparser-v.5.0.0] [sin(pi)+cos(pi)] checking ... [sin(pi)+cos(pi)] (sin, 0) invalid <TOKEN>. [sin(pi)+cos(pi)] (cos, 5) invalid <TOKEN>. [sin(pi)+cos(pi)] errors were found. [mXparser-v.5.0.0] *** Example 4: Printing removed built-in tokens : sin, cos, [mXparser-v.5.0.0] [mXparser-v.5.0.0] *** Example 4: Un-removing built-in token [mXparser-v.5.0.0] [sin(pi)+cos(pi)] checking ... [sin(pi)+cos(pi)] (sin, 0) invalid <TOKEN>. [sin(pi)+cos(pi)] errors were found. [mXparser-v.5.0.0] *** Example 5: Un-removing all built-in token [mXparser-v.5.0.0] [sin(pi)+cos(pi)] checking ... [sin(pi)+cos(pi)] no errors. [mXparser-v.5.0.0]
Case 2: Modifying built-in tokens
import org.mariuszgromada.math.mxparser.*;
...
/*
* Modifying built-in tokens methods:
*
* mXparser.modifyBuiltinToken(String currentToken, String newToken)
* mXparser.modifyBuiltinToken(String currentToken, String newToken, String newTokenDescription)
* mXparser.unmodifyBuiltinTokens(String... currentOrNewTokens)
* mXparser.unmodifyAllBuiltinTokens()
* mXparser.getBuiltinTokensToModify()
*/
Expression e;
/*
* Example 1: "sine" and "cosine" are not defined
*/
e = new Expression("sine(pi)+cosine(pi)");
e.checkSyntax();
mXparser.consolePrintln("*** Example 1: \"sine\" and \"cosine\" are not defined");
mXparser.consolePrintln("\n\n" + e.getErrorMessage());
/*
* Example 2: Changing "sin" to "sine"
*/
mXparser.modifyBuiltinToken("sin", "sine");
e.checkSyntax();
mXparser.consolePrintln("*** Example 2: Changing \"sin\" to \"sine\"");
mXparser.consolePrintln("\n\n" + e.getErrorMessage());
/*
* Example 3: Changing "cos" to "cosine" + setting new description
*/
mXparser.modifyBuiltinToken("cos", "cosine", "My new cosine token");
e.checkSyntax();
mXparser.consolePrintln("*** Example 3: Changing \"cos\" to \"cosine\" + setting new description");
mXparser.consolePrintln("\n\n" + e.getErrorMessage());
mXparser.consolePrintHelp("My new cosine");
mXparser.consolePrintln();
/*
* Example 4: Printing modified built-in tokens
*/
mXparser.consolePrintln("*** Example 4: Printing modified built-in tokens: ");
String[][] modifiedTokens = mXparser.getBuiltinTokensToModify();
mXparser.consolePrintln();
for (int i = 0; i < modifiedTokens.length; i++) {
String currentToken = modifiedTokens[i][0];
String newToken = modifiedTokens[i][1];
String newTokenDescription = modifiedTokens[i][2];
mXparser.consolePrintln(currentToken + " -> " + newToken + ", " + newTokenDescription);
}
mXparser.consolePrintln();
/*
* Example 5: Un-modifying "sin" token
*/
e = new Expression("sine(pi)+cosine(pi)");
mXparser.unmodifyBuiltinTokens("sin");
e.checkSyntax();
mXparser.consolePrintln("*** Example 5: Un-modifying \"sin\" token");
mXparser.consolePrintln("\n\n" + e.getErrorMessage());
/*
* Example 6: Un-modifying all modified token
*/
mXparser.unmodifyAllBuiltinTokens();
e.checkSyntax();
mXparser.consolePrintln("*** Example 6: Un-modifying all modified token");
mXparser.consolePrintln("\n\n" + e.getErrorMessage());
[mXparser-v.5.0.0]
[sine(pi)+cosine(pi)] checking ...
[sine(pi)+cosine(pi)] (sin, 0) <FUNCTION> expecting 1 argument.
[sine(pi)+cosine(pi)] (cos, 8) <FUNCTION> expecting 1 argument.
[sine(pi)+cosine(pi)] (in, 10) invalid <TOKEN>.
[sine(pi)+cosine(pi)] errors were found.
[mXparser-v.5.0.0] *** Example 2: Changing "sin" to "sine"
[mXparser-v.5.0.0]
[sine(pi)+cosine(pi)] checking ...
[sine(pi)+cosine(pi)] (cos, 5) <FUNCTION> expecting 1 argument.
[sine(pi)+cosine(pi)] (in, 7) invalid <TOKEN>.
[sine(pi)+cosine(pi)] errors were found.
[mXparser-v.5.0.0] *** Example 3: Changing "cos" to "cosine" + setting new description
[mXparser-v.5.0.0]
[sine(pi)+cosine(pi)] checking ...
[sine(pi)+cosine(pi)] no errors.
[mXparser-v.5.0.0] Help content:
# key word type syntax since description
- -------- ---- ------ ----- -----------
73. cosine <Unary Function> cosine(x) 1.0 My new cosine token
[mXparser-v.5.0.0] *** Example 4: Printing modified built-in tokens:
[mXparser-v.5.0.0]
[mXparser-v.5.0.0] sin -> sine, null
[mXparser-v.5.0.0] cos -> cosine, My new cosine token
[mXparser-v.5.0.0]
[mXparser-v.5.0.0] *** Example 5: Un-modifying "sin" token
[mXparser-v.5.0.0]
[sine(pi)+cosine(pi)] checking ...
[sine(pi)+cosine(pi)] (sin, 0) <FUNCTION> expecting 1 argument.
[sine(pi)+cosine(pi)] errors were found.
[mXparser-v.5.0.0] *** Example 6: Un-modifying all modified token
[mXparser-v.5.0.0]
[sine(pi)+cosine(pi)] checking ...
[sine(pi)+cosine(pi)] (sin, 0) <FUNCTION> expecting 1 argument.
[sine(pi)+cosine(pi)] (cos, 8) <FUNCTION> expecting 1 argument.
[sine(pi)+cosine(pi)] (in, 10) invalid <TOKEN>.
[sine(pi)+cosine(pi)] errors were found.
[mXparser-v.5.0.0]
Case 3: Overriding built-in tokens
import org.mariuszgromada.math.mxparser.*;
...
/*
* Overriding built-in tokens methods:
*
* mXparser.setToOverrideBuiltinTokens();
* mXparser.setNotToOverrideBuiltinTokens();
* mXparser.checkIfsetToOverrideBuiltinTokens();
*/
Expression e;
/*
* Example 1: user defined function and user defined constant with name conflict
*/
Function sin = new Function("sin(x) = 2*x");
Constant pi = new Constant("pi = 1");
e = new Expression("sin(pi)", sin, pi);
e.checkSyntax();
mXparser.consolePrintln("*** Example 1: user defined function and user defined constant with name conflict");
mXparser.consolePrintln("\n\n" + e.getErrorMessage());
/*
* Example 2: Setting option to override built-in tokens
*/
mXparser.setToOverrideBuiltinTokens();
e.checkSyntax();
mXparser.consolePrintln("*** Example 2: Setting option to override built-in tokens");
mXparser.consolePrintln("\n\n" + e.getErrorMessage());
mXparser.consolePrintln();
mXparser.consolePrintln(e.getExpressionString() + " = " + e.calculate());
/*
* Example 3: Checking override built-in tokens option
*/
mXparser.consolePrintln();
mXparser.consolePrintln("*** Example 3: Checking override built-in tokens option");
mXparser.consolePrintln(" Option = " + mXparser.checkIfsetToOverrideBuiltinTokens());
/*
* Example 4: Setting option not to override built-in tokens
*/
mXparser.consolePrintln();
e = new Expression("sin(pi)", sin, pi);
mXparser.setNotToOverrideBuiltinTokens();
e.checkSyntax();
mXparser.consolePrintln("*** Example 4: Setting option not to override built-in tokens");
mXparser.consolePrintln("\n\n" + e.getErrorMessage());
[mXparser-v.5.0.0] *** Example 1: user defined function and user defined constant with name conflict [mXparser-v.5.0.0] [sin(pi)] checking ... [sin(pi)] (pi) Duplicated <KEYWORD>. [sin(pi)] (sin) Duplicated <KEYWORD>. [sin(pi)] errors were found. [mXparser-v.5.0.0] *** Example 2: Setting option to override built-in tokens [mXparser-v.5.0.0] [sin(pi)] checking ... [sin(pi)] (sin, 0) checking user defined function ... [sin(pi)] -> [sin] = [ 2*x] checking ... [sin(pi)] -> [sin] = [ 2*x] no errors. [sin(pi)] no errors. [mXparser-v.5.0.0] [mXparser-v.5.0.0] sin(pi) = 2.0 [mXparser-v.5.0.0] [mXparser-v.5.0.0] *** Example 3: Checking override built-in tokens option [mXparser-v.5.0.0] Option = true [mXparser-v.5.0.0] [mXparser-v.5.0.0] *** Example 4: Setting option not to override built-in tokens [mXparser-v.5.0.0] [sin(pi)] checking ... [sin(pi)] (pi) Duplicated <KEYWORD>. [sin(pi)] (sin) Duplicated <KEYWORD>. [sin(pi)] errors were found. [mXparser-v.5.0.0]
Nuget
Install-Package MathParser.org-mXparser -Version 5.0.2Maven
<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-mXparserOTHER 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
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SOURCE CODE
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