ComplexDoubleRTable.select - Maple Programming Help

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ComplexDoubleRTable.select

access a complex double stored in the ComplexDoubleRTable

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

Parameters

 index - index of the entry to select

Description

 • The select function returns the complex double indexed by index in the ComplexDoubleRTable.  The return value is a array of length $2$.
 • The array returned has the real component stored at index $0$ and the imaginary component stored at index $1$.
 • The index parameter is an array of integers, one for each dimension of the ComplexDoubleRTable. 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[]; Engine engine; ComplexDoubleRTable a1; int index[]; double e[]; mapleArgs = new String[1]; mapleArgs[0] = "java"; engine = new Engine( mapleArgs, new EngineCallBacksDefault(), null, null ); a1 = (ComplexDoubleRTable)engine.evaluate( "Array( 1..2, 1..2, [[0.1,0.2],[0.3+.3*I,0.4+0.4*I]], datatype=complex[8]):" ); index = new int[2]; index[0] = 1; index[1] = 1; e = a1.select( index ); System.out.println( "Real: "+e[0] ); System.out.println( "Imag: "+e[1] ); index[0] = 2; index[1] = 1; e = a1.select( index ); System.out.println( "Real: "+e[0] ); System.out.println( "Imag: "+e[1] ); index[0] = 1; index[1] = 2; e = a1.select( index ); System.out.println( "Real: "+e[0] ); System.out.println( "Imag: "+e[1] ); index[0] = 2; index[1] = 2; e = a1.select( index ); System.out.println( "Real: "+e[0] ); System.out.println( "Imag: "+e[1] ); } }

Executing this code produces the following output.

 Real: 0.1 Imag: 0.0 Real: 0.3 Imag: 0.3 Real: 0.2 Imag: 0.0 Real: 0.4 Imag: 0.4