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Herman, the only point I made ... was the lesson I learned ....
That IsEmpty() works fine with Uninitialized STATIC variables, but it does
not work with "normal" variables that are uninitialized.
Ara
----- Original Message -----
From: "Herman van den Bergen" <psytek@xxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Tuesday, August 10, 2004 2:14 AM
Subject: RE: [amibroker] Variables not initialized
> I don't understand...if you want a=1 initialized once only, at AB startup,
> then you should use a Static variable for "a", other variables have no
> memory of past executions so they are initialized at each pass; there is
no
> way around that.
>
> herman
> -----Original Message-----
> From: Ara Kaloustian [mailto:ara1@xxxxxxxxxx]
> Sent: Monday, August 09, 2004 11:01 PM
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: Re: [amibroker] Variables not initialized
>
>
> Herman
>
> Thanks...
>
> I went thru your code ... bottom line ... it provides a solution for me
> ...
> but here are some observations.
>
> IsEmpty() works OK with uninitialized STATIC variables, but not with
> regular AFL variables.
>
> Ara
>
>
>
> //This line works OK
>
> if( IsEmpty(StaticVarGet("IsInitialized7")))
>
> {
>
> a=1;
>
> }
>
> //This Line generates error "variable NOT initialized"
>
> if( IsEmpty(IsInitialized3))
>
> {
>
> b=1;
>
> }
>
> ----- Original Message -----
> From: "Herman van den Bergen" <psytek@xxxxxxxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Monday, August 09, 2004 7:09 PM
> Subject: RE: [amibroker] Variables not initialized
>
>
> > Ara, if i understand you correctly then you need to use
StaticVariables.
> >
> > I use one called "IsInitialized", like below. Here i initialize
> > Staticvariables only once at the AB startup or first run of the code.
> > Instead of Static variables you can initialize standard afl variables
> > between the curly brackets. Just remember to keep the last one that
sets
> > IsInitialized to one.
> >
> > take care,
> > herman
> > GlobalReset = Param("GlobalReset",0,0,1,1);
> > if( IsEmpty(StaticVarGet("IsInitialized")) OR GlobalReset )
> > {
> > StaticVarSetText("TickString","");
> > StaticVarSet("LastTickPrice",LastValue(C));
> > StaticVarSet("LastBarNum",BarCount);
> > StaticVarSet("DownTicks",0);
> > StaticVarSet("UpTicks", 0);
> > StaticVarSet("SecondTimer", GetSecondNum());
> > StaticVarSet("NumTicks",0);
> > StaticVarSet("IsInitialized",1);
> > }
> >
> >
>
>
>
> --------------------------------------------------------------------------
> --
> > ----
> >
> > -----Original Message-----
> > From: Ara Kaloustian [mailto:ara1@xxxxxxxxxx]
> > Sent: Monday, August 09, 2004 9:37 PM
> > To: amibroker@xxxxxxxxxxxxxxx
> > Subject: Re: [amibroker] Variables not initialized
> >
> >
> > Herman,
> >
> > I also initialize my variable to 0 ..... but I don't want to do it
the
> > "normal" way ...
> >
> > if I initialize to Null, (or anthing else) then AB will initialize
to
> > Null
> > for every time the code executes.
> >
> > Last_BuyState = Null;
> >
> > IsNull(Last_BuyState) ... the result will always be True.
> >
> > I am trying to have a scheme where I set variables only once when AB
> is
> > first turned on
> >
> > if (IsNull(Last_BuyState)
> > {
> > //initialize variable
> > Last_BuyState = Null;
> > }
> >
> > ... else no action
> >
> > Any way of working that?
> >
> > Ara
> >
> >
> > ----- Original Message -----
> > From: "Herman van den Bergen" <psytek@xxxxxxxx>
> > To: <amibroker@xxxxxxxxxxxxxxx>
> > Sent: Monday, August 09, 2004 6:02 PM
> > Subject: RE: [amibroker] Variables not initialized
> >
> >
> > > Before using any variable you can initialize it to NULL, you can
do
> this
> > as
> > > the top of your code for all variables that need separate
> > initialization.
> > > then later you can check and know the variable is not initialized
> when
> > its
> > > value is NULL. I always initialize all my variables to either zero
> or
> > NULL.
> > > Null is nice for signals that will be plotted, as NULL doesn't
plot.
> You
> > can
> > > check for NULL in various ways:
> > >
> > > You have to remember that arrays can be partly initialized... to
see
> if
> > an
> > > array contains any NULLs you can use: Cum(Array == NULL) > 0
> > >
> > > best regards,
> > > herman
> > >
> > >
> > >
> > >
> > > -----Original Message-----
> > > From: Ara Kaloustian [mailto:ara1@xxxxxxxxxx]
> > > Sent: Monday, August 09, 2004 8:48 PM
> > > To: AB-Main
> > > Subject: [amibroker] Variables not initialized
> > >
> > >
> > > When I use the line below I get an error that "Variable ... is
not
> > > initialized" ... which is correct
> > >
> > > Null_Test =
> >
> >
> > >
> > > Looking for a way to do same test for uninitialized variables,
> such
> as
> > >
> > > Init_Test = IsNotInit(Last_BuyState));
> > >
> > > "IsNotInit" function does not exist ... is there a workaround
for
> > this?
> > >
> > >
> > >
> > > Would like to be able to do this:
> > >
> > > if (IsNotInit(Last_BuyState)) {Last_BuyState = Null; } // or
any
> > other
> > > value
> > >
> > > This will allow me to initialize variables when first starting
> program
> > > without having to make an assignments that repeats every cycle
thru
> the
> > code
> > >
> > >
> > >
> > > Thanks
> > >
> > >
> > >
> > > Ara
> > >
> > >
> > >
> > >
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> > >
> > >
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> > > http://www.amibroker.com/
> > >
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> > >
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