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<FONT face=Arial color=#0000ff
size=2>InLine,,,
<FONT face=Tahoma
size=2>-----Original Message-----From: see_change007
[mailto:cvt@xxxxxxxxxxxxxx]Sent: Monday, August 09, 2004 8:47
AMTo: amibroker@xxxxxxxxxxxxxxxSubject: [amibroker] Re:
Static Variables
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.<SPAN
class=390505712-09082004> X = n is
a normal afl variable, to make it Static you have to use
StaticVarSet() if you define it at the begin of the code containing
the assignment then it will be redefined each time this code
runs regardless of what values may have been assigned to it before from
other places; i.e. it would function
locally. 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. <FONT face=Arial
color=#0000ff size=2>
<FONT face=Arial color=#0000ff
size=2>I do not know to what extend invisible indicators are executed... i
suppose they are not however they may collect prices in RealTime... I
don't know exactly what happens here, you could try it and see what
happens.
<FONT face=Arial color=#0000ff
size=2>
<FONT face=Arial color=#0000ff
size=2>However, visible indicators using the same StaticVariable will each
execute and modify StaticVar unless they are kept local (unique) with the
use of TJ's functions or if they are locally initialized in each indicator,
i.e. with Param()If I wanted to avoid this and was
using a static variable within one indicator , I could set that by
coding <FONT face=Arial color=#0000ff
size=2>
<FONT face=Arial color=#0000ff
size=2>If you only use it in one indicator, yes. If you want to use the
same Static variables names independently in many Indicators (use
the same code in different places) but have them function locally then they
should be kept unique and you should use TJ's
functions. StaticVarSet( ''x'', n );Is this
correct ?<FONT face=Arial color=#0000ff
size=2> 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@xxxx]> 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@xxxx]> 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> >
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page at:> <A
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