Re: [amibroker] Static Variables

["Tomasz Janeczko" <amibroker@xxxxxx>]

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 
Janeczkoamibroker.com
<BLOCKQUOTE dir=ltr 
>
  ----- Original Message ----- 
  <DIV 
  >From: 
  Herman van den 
  Bergen 
  To: <A title=amibroker@xxxxxxxxxxxxxxx 
  href="">amibroker@xxxxxxxxxxxxxxx 
  Sent: Monday, August 09, 2004 3:28 
  AM
  Subject: RE: [amibroker] Static 
  Variables
  
  <FONT face=Arial color=#0000ff 
  size=2>Ara,
  <FONT face=Arial color=#0000ff 
  size=2> 
  You 
  have to be careful scoping the Static Variables, 
  <FONT face=Arial color=#0000ff 
  size=2> 
  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...
  <FONT face=Arial color=#0000ff 
  size=2> 
  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.
  <FONT face=Arial color=#0000ff 
  size=2> 
  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.
  <FONT face=Arial color=#0000ff 
  size=2> 
  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 = <FONT color=#0000ff 
  size=2>NumToStr(<FONT color=#0000ff 
  size=2>GetChartID(),<FONT color=#ff00ff 
  size=2>1.0,False); Reset = 
  Param(<FONT 
  color=#ff00ff size=2>"Reset Static variables",<FONT 
  color=#ff00ff size=2>0,<FONT color=#ff00ff 
  size=2>0,1<FONT 
  size=2>,1<FONT 
  size=2>);StaticScope = Param(<FONT 
  color=#ff00ff>"Scope (0:Local,1:Global) for Chart#"+ChartID,<FONT 
  color=#ff00ff>1,0,<FONT 
  color=#ff00ff>1,1);<FONT 
  color=#800000>if( StaticScope ) Scope = <FONT 
  color=#ff00ff>""; else<FONT 
  size=2> Scope = ChartID;<SPAN 
  class=343574700-09082004>.<SPAN 
  class=343574700-09082004>..<FONT 
  color=#800000>if<FONT color=#000000 
  size=2>( IsEmpty<FONT color=#000000 
  size=2>( StaticVarGet<FONT 
  color=#000000 size=2>(<FONT color=#ff00ff 
  size=2>"TickCounter"<FONT 
  color=#000000>+Scope)) OR Reset)<FONT color=#0000ff 
  size=2>StaticVarSet(<FONT color=#ff00ff 
  size=2>"TickCounter"+Scope,<FONT color=#ff00ff 
  size=2>0);TickCount = <FONT 
  color=#0000ff size=2>StaticVarGet(<FONT 
  color=#ff00ff size=2>"TickCounter"<FONT 
  size=2>+Scope);<FONT 
  color=#800000>
  <SPAN 
  class=343574700-09082004><SPAN 
  class=343574700-09082004>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,
  <SPAN 
  class=343574700-09082004>herman.
  <FONT face=Arial 
  color=#0000ff> 
   
  <SPAN 
  class=343574700-09082004> <FONT face=Tahoma 
  size=2>-----Original Message-----From: Ara Kaloustian 
  [mailto:ara1@xxxxxxxxxx]Sent: Sunday, August 08, 2004 8:46 
  PMTo: AB-MainSubject: [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
     
    AraCheck AmiBroker web 
    page at:<A 
    href="">http://www.amibroker.com/Check 
    group FAQ at: <A 
    href="">http://groups.yahoo.com/group/amibroker/files/groupfaq.html 
    Check AmiBroker web page at:<A 
    href="">http://www.amibroker.com/Check 
    group FAQ at: <A 
    href="">http://groups.yahoo.com/group/amibroker/files/groupfaq.html 
    


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