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Just want to make sure I 'm correct in one thing.
If I define X = n at the begining of a formular then X is a static
variable.
And if I'm using the same symbols eg x to represent variables in
different indicators, even if the indicators may not be in use at
one particular time on active charts , the settings in one one
formular may interact with other forumulars containing the same
formular.
If I wanted to avoid this and was using a static variable within one
indicator , I could set that by coding
StaticVarSet( ''x'', n );
Is this correct ?
See Change
--- In amibroker@xxxxxxxxxxxxxxx, "Herman van den Bergen"
<psytek@xxxx> wrote:
> Great suggestion Tomasz, thanks for your input!
>
> This will make things a lot simpler to code.
>
> best regards,
> herman.
>
>
> -----Original Message-----
> From: Tomasz Janeczko [mailto:amibroker@x...]
> Sent: Monday, August 09, 2004 5:31 AM
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: Re: [amibroker] Static Variables
> Importance: High
>
>
> Herman,
>
> One thing: You don't need to worry about adding such complex
coding all
> the time.
> Instead you should use FUNCTIONS that make life easier.
> If you want "unique static" (per indicator) you can easily have
them using
> these two functions:
>
> procedure UnqStaticVarSet( name, value )
> {
> StaticVarSet( name + GetChartID(), value );
> }
>
> function UnqStaticVarGet( name )
> {
> return StaticVarGet( name + GetChartID() );
> }
>
> then use UnqStaticVarSet, UnqStaticVarGet in your code
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message -----
> From: Herman van den Bergen
> To: amibroker@xxxxxxxxxxxxxxx
> Sent: Monday, August 09, 2004 3:28 AM
> Subject: RE: [amibroker] Static Variables
>
>
> Ara,
>
> You have to be careful scoping the Static Variables,
>
> 1) If you use same name static variables in different
indicators then
> their values can change from various sources. This is the case if
you assign
> program derived values, for example counters ,not in the case of
param() see
> next...
>
> 2) If the Static variables are initialized inside the code
with a
> Param() in EACH of the Indicators then in essence you have
disabled the
> Global nature of the Static Variable: this is so because the
Static variable
> is reinitialized in each Indicator separately each time the code
is executed
> (on Refresh). This makes it immune to whatever other code does.
>
> 3) Static variables are truly Global, in contrast to afl
variables
> declared Global in afl, these are Global 'per' indicator. Static
variables
> are Global per AmiBroker Instance.
>
> 4) If you want to restrict the scope of Static variables to
the current
> Indicator, to prevnt conflicing conditions, then you have to add a
unique
> identifier to each code, I use something like this:
> ChartID = NumToStr(GetChartID(),1.0,False);
> Reset = Param("Reset Static variables",0,0,1,1);
> StaticScope = Param("Scope (0:Local,1:Global) for
> Chart#"+ChartID,1,0,1,1);
> if( StaticScope ) Scope = ""; else Scope = ChartID;
> ...
> if( IsEmpty( StaticVarGet("TickCounter"+Scope)) OR Reset)
> StaticVarSet("TickCounter"+Scope,0);
> TickCount = StaticVarGet("TickCounter"+Scope);
>
> here a tickcounter is made Local to the indicator containing
the code to
> prevent interference with duplicate code in other indicators. This
means i
> can count ticks from fifferent stocks while using the SAME
indicator.
>
> Hope this helps,
>
> herman.
>
>
>
>
>
> -----Original Message-----
> From: Ara Kaloustian [mailto:ara1@x...]
> Sent: Sunday, August 08, 2004 8:46 PM
> To: AB-Main
> Subject: [amibroker] Static Variables
>
>
>
> I am having a hard time using static variables....
>
> Sometimes they work as expected ... sometimes they don't ...
so my
> expectation must obviously be questionable.
>
> I am assuming Static variables can be used anywhere that
normal Number
> and String variables can be used!
>
> - in assignments: StaticVarSet("Var",Value);
> - in If Statements: if (StaticVarGet("Var") == Value) ....
> - in iif Statement: Test = iif(StaticVarGet("Var")
> ==Value,True,False);
>
> Is my assumption correct?
>
> Thanks
>
> Ara
>
>
> Check AmiBroker web page at:
> http://www.amibroker.com/
>
> Check group FAQ at:
> http://groups.yahoo.com/group/amibroker/files/groupfaq.html
>
>
>
>
> Check AmiBroker web page at:
> http://www.amibroker.com/
>
> Check group FAQ at:
> http://groups.yahoo.com/group/amibroker/files/groupfaq.html
>
>
>
>
>
> Check AmiBroker web page at:
> http://www.amibroker.com/
>
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> http://groups.yahoo.com/group/amibroker/files/groupfaq.html
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