DoubleRTable.select
access a double stored in the DoubleRTable
Calling Sequence
Parameters
Description
Examples
double select( int index[] ) throws MapleException
index
-
index of the entry to select
The select function returns the Java double indexed by index in the DoubleRTable
The index parameter is an array of integers, one for each dimension of the DoubleRTable. Each integer must be within the bounds determined by lowerBound and upperBound. The index for dimension i is stored in the array at position i−1.
import com.maplesoft.openmaple.*;
import com.maplesoft.externalcall.MapleException;
class Example
{
public static void main( String notused[] ) throws MapleException
String[] mapleArgs = { "java" };
Engine engine = new Engine( mapleArgs, new EngineCallBacksDefault(), null, null );
DoubleRTable rt = (DoubleRTable)engine.evaluate( "Array( 1..2, 1..2, evalf( [[1/3, 1/4],[1/5,1/6]] ), datatype=float[8] ):" );
int[] index = new int[2];
index[0] = 1;
index[1] = 1;
double d = rt.select( index );
System.out.println( d );
index[1] = 2;
d = rt.select( index );
index[0] = 2;
}
Executing this code produces the following output.
0.3333333333
0.25
0.2
0.1666666667
See Also
ExternalCalling/Java/MapleException
OpenMaple
OpenMaple/Java/API
OpenMaple/Java/DoubleRTable
OpenMaple/Java/DoubleRTable/assign
OpenMaple/Java/RTable
OpenMaple/Java/RTable/lowerBound
OpenMaple/Java/RTable/upperBound
Download Help Document
