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Tomasz,
the theoretical explanation is clear, the example is a bit confusing:
We may equally plot 10-bar MA exclusively for MSFT with the use of
IIF statement
k=IIf(Name()=="MSFT",MA(C,10),-1E10);
Plot(C,"",1,64);
Plot(K,"",4,1);
Title=Name()+", CLOSE="+WriteVal(C)+WriteIf(Name()=="MSFT",",
10MA="+WriteVal(K),"");
Another example perhaps ?
Dimitris Tsokakis
--- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <amibroker@xxxx>
wrote:
> Hello,
>
> It seems that people tend to confuse if-else and IIF. Here is some
more explanation:
>
> if-else is flow control statement. it allows you to change the flow
of the program (skip some parts of the formula)
>
> if( Name() == "MSFT" )
> {
> // the special handling for MSFT
> // this part is executed only for MSFT and skipped for all other
symbols
> Plot( MA( Close, 10 ), "MA10 for Microsoft only", colorGreen );
> }
>
>
> - in this example moving average it plotted ONLY when ticker is
MSFT. The part in curly braces is skipped
> completely if ticker is different.
>
> IIF is a FUNCTION that evaluates all arguments always and just
returns the value of 2nd or 3rd argument
> depending on condition (1st argument). There is no way to skip any
part of the formula using IIF.
>
> Also IIF works on ARRAYS while if is a statement that works on
single TRUE/FALSE value;
>
> IIF in fact can be re-implemented using if-else
>
> function IIFreimplemented( ConditionArray, TrueArray, FalseArray )
> {
> for( i = 0; i < BarCount; i++ )
> {
> if( ConditionArray[ i ] )
> {
> result[ i ] = TrueArray[ i ];
> }
> else
> {
> result[ i ] = FalseArray[ i ];
> }
> }
> }
>
> IIFreimplemented works exactly like built-in IIF.
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
> Best regards,
> Tomasz Janeczko
> amibroker.com
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