Re: [amibroker] Re: getting an error in my if statement, AmiBroker Email List Archive

On 26/08/07, Fred Tonetti <ftonetti@xxxxxxxxxxxxx> wrote:

Forgetting for a minute which form is array oriented and which isn't, I'm not sure why you see that much distinction in terms of simplicity or complexity between a nested if this …

Result = False;

If (Trigger == True)

{

    If (C1 == True)

    {

        If (C2 == True)

        {

            Result = True;

        }

    }

}

… and a nested iif like this …

Result = iif(Trigger,

                 iif(C1,

                     iif(C2, True, False),

                 False),

             False);

From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf Of lifes_student_1
Sent: Saturday, August 25, 2007 10:25 PM
To: amibroker@xxxxxxxxxxxxxxx
Subject: [amibroker] Re: getting an error in my if statement

using iif(this and that and another, 1,0) wouldn't be too bad. It
would (for me) get really messy and hard to read to try nested iif
statements though. I appreciate your help.

--- In amibroker@xxxxxxxxxxxxxxx, Graham <kavemanperth@xxx> wrote:
>
> there are different ways to achieve things, for simple conditions to
> give true/false result you can simply use statement with OR/AND. The
> following assigns true to results if all 3 conditions are true on
the
> same bar
>
> Result = Trigger AND C1 AND C2;
>
> to assign values to the variable for true/false result, these values
> can be arrays are scalar
>
> Result = iif( Trigger AND C1 AND C2, A, B );
>
> Nested IIF can also allow you to work through combinations of the
> conditions to give different resulting values. Just by placing the
> more stringent first and work from there
>
> Result = iif( Trigger AND C1 AND C2, A, iif( Trigger AND C1, B, iif(
> Trigger AND C2, C, iif( C1 and C2, D, E ))));
>
> These are much easier and straightforward than looping. I only use
> loops if the results I want depend on previous values of the same
> array for the current value, or to isolate a particular repeating
> occurence to only use the first occurence and ignore the rest (where
> other simple methods do not work). Loops can slow down the running
of
> AFL and best to be avoided unless really necessary. They can also
tie
> your brain up in knots getting the logic correct when a simple
method
> is easier and faster.
>
>
> --
> Cheers
> Graham Kav
> AFL Writing Service
> http://www.aflwriting.com
> On 26/08/07, lifes_student_1 <suedeuno@xxx> wrote:
> > It's a bit more complicated than my example. I need to check for
> > several cases and I would generally use an if statement for
something
> > like this. Something like:
> >
> > result = false;
> > if (trigger == true)
> > {
> > if (c1 == true)
> > {
> > if (c2 == true)
> > {
> > result = true;
> > }
> > }
> > }
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, Graham <kavemanperth@> wrote:
> > >
> > > Not knowing what you are trying to do why not try the simpler
and
> > > faster IIF function
> > >
> > > --
> > > Cheers
> > > Graham Kav
> > > AFL Writing Service
> > > http://www.aflwriting.com
> > >
> > >
> > >
> > > On 26/08/07, lifes_student_1 <suedeuno@> wrote:
> > > > Thanks. Why can't I do the following though that should
result in
> > a
> > > > boolean:
> > > >
> > > > color = colorLime;
> > > > color2 = colorRed;
> > > > i1 = colorLime;
> > > > c1 = ((i1 == color OR i1 == color2));
> > > > if (c1 == true)
> > > > {...
> > > >
> > > >
> > > > This doesn't work. I guess I'm not used to AFL.
> > > >
> > > >
> > > >
> > > > --- In amibroker@xxxxxxxxxxxxxxx, "Thomas Z." <tzg@> wrote:
> > > > >
> > > > > You need a loop and then you could write if(barsback[i] < 6)
> > > > >
> > > > > The other way would be to use IIF()
> > > > >
> > > > > Regards
> > > > > Thomas
> > > > > www.patternexplorer.com
> > > > >
> > > > >
> > > > >
> > > > > From: amibroker@xxxxxxxxxxxxxxx
> > [mailto:amibroker@xxxxxxxxxxxxxxx]
> > > > On Behalf
> > > > > Of lifes_student_1
> > > > > Sent: Saturday, August 25, 2007 8:28 PM
> > > > > To: amibroker@xxxxxxxxxxxxxxx
> > > > > Subject: [amibroker] getting an error in my if statement
> > > > >
> > > > > condition1 = cross(close, ma(close,20));
> > > > > barsback = BarsSince(condition1 == true);
> > > > > if(barsback < 6)
> > > > > {...
> > > > >
> > > > > I'm getting error 6 on barsback in if statement. condition1
is
> > set
> > > > and
> > > > > works as I've tested it elsewhere. What am I doing wrong?
> > > > >
> > > > > (Condition in IF, WHILE, FOR statements has to be Numeric or
> > > > Boolean
> > > > > type. You cannot use an array here....)
> > > > >
> > >
> >
> >
> >
> >
> > Please note that this group is for discussion between users only.
> >
> > To get support from AmiBroker please send an e-mail directly to
> > SUPPORT {at} amibroker.com
> >
> > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
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> >
> > For other support material please check also:
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> >
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> >
> >
> >
> >
>

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