|
Expseq.assign - assign a value into an element of the expression sequence
|
|
Calling Sequence
|
|
void assign( int i, Algebraic val ) throws MapleException
|
|
|
Parameters
|
|
|
i
|
-
|
index of the entry to assign
|
|
val
|
-
|
value to assign into the expression sequence
|
|
|
|
|
|
Description
|
|
|
•
|
The assign function assigns the Algebraic object val into the element of the Expseq indexed by i.
|
|
•
|
The assign function can only be called on an Expseq, which is not a unique representation. For more information, see unique.
|
|
•
|
Valid values of i are  where  is the length of the expression sequence. The length can be obtained by calling length.
|
|
|
|
Examples
|
|
|
import com.maplesoft.openmaple.*;
|
|
import com.maplesoft.externalcall.MapleException;
|
|
class Example
|
|
{
|
|
public static void main( String notused[] ) throws MapleException
|
|
{
|
|
String mapleArgs[];
|
|
Engine engine;
|
|
Expseq e;
|
|
mapleArgs = new String[1];
|
|
mapleArgs[0] = "java";
|
|
engine = new Engine( mapleArgs, new EngineCallBacksDefault(),
|
|
null, null );
|
|
e = (Expseq)engine.evaluate( "1,2,3:" );
|
|
try
|
|
{
|
|
e.assign( 1, engine.newNumeric( 2.2 ) );
|
|
}
|
|
catch ( MapleException me )
|
|
{
|
|
System.out.println( me.getMessage() );
|
|
}
|
|
e = engine.newExpseq( 3 );
|
|
e.assign( 1, engine.newNumeric( 1 ) );
|
|
e.assign( 2, engine.newNumeric( 2 ) );
|
|
e.assign( 3, engine.newNumeric( 3 ) );
|
|
e = (Expseq)e.unique();
|
|
System.out.println( e );
|
|
}
|
|
}
|
|
|
Executing this code produces the following output.
|
Error, expression sequences from Maple cannot be modified in-place
|
|
[1, 2, 3]
|
|
|
|
|
Download Help Document
Was this information helpful?
