select - Maple Help
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DoubleRTable.select

access a double stored in the DoubleRTable

 Calling Sequence double select( int index[] ) throws MapleException

Parameters

 index - index of the entry to select

Description

 • 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 $i-1$.

Examples

 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[0] = 1; index[1] = 2; d = rt.select( index ); System.out.println( d ); index[0] = 2; index[1] = 1; d = rt.select( index ); System.out.println( d ); index[0] = 2; index[1] = 2; d = rt.select( index ); System.out.println( d ); } }

Executing this code produces the following output.

 0.333333 0.25 0.2 0.166667