jhplot.math

Class Symbolic

java.lang.Object

jhplot.math.Symbolic

public class Symbolic
extends Object

Symbolic calculations. Select the symbolic engine, such as "jasymca" (default), "jscl" or "symja". Read the manual for the description.

Constructor Summary

Constructors

Constructor and Description
Symbolic() Initialize symbolic calculations using jasymca as the main engine.
Symbolic(String engine) Set engine for symbolic calculations.

Method Summary

Modifier and Type	Method and Description
static String	derivative(String s) Symbolic derivative.
String	elementary(String s) Rewrite an expression in term of elementary functions (log, exp, frac, sqrt, implicit roots).
String	eval(String str) Evaluate an expression with the given engine.
void	exec(String str) Execute a set of expressions.
String	expand(String s) Expanding a math formula.
String	factorize(String s) Factorize math formula.
Object	getEngine() Return the symbolic engine.
String	getEngineName() Return the name of the current engine.
String	numeric(String s) Evaluate numerical values and perform some substitutions.
String	simplify(String s) Simplify equation.
String	toJava(String s) Convert math equation to Java code
String	toMathML(String s) Convert an equation to MathML form.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Symbolic

public Symbolic(String engine)

Set engine for symbolic calculations. This can be either "jasymca", "jscl" or "symja"

Parameters:

engine - engine type. Can be "jasymc", "jscl" or "symja".

Symbolic

public Symbolic()

Initialize symbolic calculations using jasymca as the main engine.

Method Detail

getEngineName

public String getEngineName()

Return the name of the current engine.

Returns:

current engine.

getEngine

public Object getEngine()

Return the symbolic engine.

Returns:

Symbolic engine or null

eval

public String eval(String str)
            throws Exception

Evaluate an expression with the given engine. For "jasymca", use the standard Matlab/Octave mode. For "jscl", use jscl syntax.

Parameters:

str - string for evaluation.

Returns:

Throws:

Exception

exec

public void exec(String str)
          throws Exception

Execute a set of expressions. This uses always jasymca mode (Octave/Matlab) syntax.

Parameters:

str - string for evaluation

Throws:

Exception

toJava

public String toJava(String s)
              throws jscl.text.ParseException

Convert math equation to Java code

Parameters:

s - input equation

Returns:

result

Throws:

jscl.text.ParseException

toMathML

public String toMathML(String s)
                throws jscl.text.ParseException

Convert an equation to MathML form.

Parameters:

s - input equation

Returns:

result

Throws:

jscl.text.ParseException

expand

public String expand(String s)
              throws jscl.text.ParseException

Expanding a math formula. This uses "jscl" engine.

Parameters:

s - input equation

Returns:

math equation after evaluation

Throws:

jscl.text.ParseException

factorize

public String factorize(String s)
                 throws jscl.text.ParseException

Factorize math formula. This uses "jscl" engine.

Parameters:

s - input equation

Returns:

after factorization.

Throws:

jscl.text.ParseException

elementary

public String elementary(String s)
                  throws jscl.text.ParseException

Rewrite an expression in term of elementary functions (log, exp, frac, sqrt, implicit roots). This uses "jscl" engine.

Parameters:

s - input equation

Returns:

result

Throws:

jscl.text.ParseException

simplify

public String simplify(String s)
                throws jscl.text.ParseException

Simplify equation. It is often useful to rewrite an expression in term of elementary functions, i.e calling "elementary" first. This uses "jscl" engine.

Parameters:

s - input equation

Returns:

result

Throws:

jscl.text.ParseException

numeric

public String numeric(String s)
               throws jscl.text.ParseException

Evaluate numerical values and perform some substitutions. This uses "jscl" engine.

Parameters:

s -

Returns:

result

Throws:

jscl.text.ParseException

derivative

public static String derivative(String s)
                         throws jscl.text.ParseException

Symbolic derivative. This uses "jscl" engine.

Parameters:

s -

Returns:

result

Throws:

jscl.text.ParseException