ComplexDoubleRTable.selectReal - Maple Programming Help

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ComplexDoubleRTable.selectReal

access the real component of a complex double stored in the ComplexDoubleRTable

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

Parameters

 index - index of the entry to select

Description

 • The selectReal function returns the real component of the complex double indexed by index in the ComplexDoubleRTable.
 • 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.selectReal( index ); System.out.println( "Real: "+e ); index[0] = 2; index[1] = 1; e = a1.selectReal( index ); System.out.println( "Real: "+e ); index[0] = 1; index[1] = 2; e = a1.selectReal( index ); System.out.println( "Real: "+e ); index[0] = 2; index[1] = 2; e = a1.selectReal( index ); System.out.println( "Real: "+e ); } }

Executing this code produces the following output.

 Real: 0.1 Real: 0.3 Real: 0.2 Real: 0.4

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