Engine.evaluate - Maple Programming Help

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Engine.evaluate

evaluate a Maple statement

 

Calling Sequence

Parameters

Description

Examples

Calling Sequence

Algebraic evaluate( String statement ) throws MapleException

Parameters

statement

-

Maple statement to be evaluated

Description

• 

The evaluate method parses then evaluates statement and returns the results as an Algebraic object.

• 

The statement parameter must be terminated with a colon or semicolon.  Using a colon suppresses output being generated.

• 

Errors generated during the parse and evaluation of the statement are directed to the errorCallBack method.  Other errors cause a MapleException to be raised.

Examples

import com.maplesoft.openmaple.*;

import com.maplesoft.externalcall.MapleException;

class Example

{

    public static void main( String notused[] ) throws MapleException

    {

    String mapleArgs[];

    Engine engine;

    mapleArgs = new String[1];

    mapleArgs[0] = "java";

    engine = new Engine( mapleArgs, new EngineCallBacksDefault(),

        null, null );

    engine.evaluate( "int(x,x);" );

    engine.evaluate( "LinearAlgebra:-RandomMatrix( 3, 3 );" );

    try

    {

        engine.evaluate( "syntax_error" );

    }

    catch ( MapleException me )

    {

        System.out.println( "Error: "+me.getMessage() );

    }

    }

}

Executing this code produces the following output.

1/2*x^2

Matrix(3,3,{(1, 1) = -21, (1, 2) = -50, (1, 3) = -79, (2, 1) = -56, (2, 2) = 30, (2, 3) = -71, (3, 1) = -8, (3, 2) = 62, (3, 3) = 28},datatype = anything,storage = rectangular,order = Fortran_order,shape = [])

Error: at offset 13, unexpected end of statement

See Also

ExternalCalling/Java/MapleException

OpenMaple

OpenMaple/Java/Algebraic

OpenMaple/Java/API

OpenMaple/Java/Engine

restart

 


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