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Re: [amibroker] AmiBroker 4.31.0 BETA Examples



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Hello,
 
I fully agree. for/while/if-else + array access is 
covered
on 3 or 4 pages of any C/C++ book
 
So this is actually less than 1% of entire C/C++ 
book.
 
So there is absolutely no need to buy/read C++ 
book
 
All you really need to know about new features in 
AFL
I described in:
 
<A 
href="">http://groups.yahoo.com/group/amibroker/message/37591
 
 
 
Best regards,Tomasz Janeczkoamibroker.com
<BLOCKQUOTE 
>
  ----- Original Message ----- 
  <DIV 
  >From: 
  <A title=uenal.mutlu@xxxxxxxxxxx 
  href="">uenal.mutlu@xxxxxxxxxxx 
  To: <A title=amibroker@xxxxxxxxxxxxxxx 
  href="">amibroker@xxxxxxxxxxxxxxx 
  Sent: Wednesday, April 16, 2003 10:39 
  AM
  Subject: Re: [amibroker] AmiBroker 4.31.0 
  BETA Examples
  
  Hi Steve,
  C++ is definitely not required to program in 
  AFL;
  
  it would be an overkill! <FONT 
  face=Arial>C++ covers maybe 10 times 
  more stuff than AFL.
  The new stuff in AFL is easily learnt within 2 
  hours.
  Simply ask the people here. 
  UM
   
  <BLOCKQUOTE 
  >
    ----- Original Message ----- 
    <DIV 
    >From: 
    <A title=jcasavant@xxxxxxxxxxxx 
    href="">Jayson 
    To: <A title=amibroker@xxxxxxxxxxxxxxx 
    href="">amibroker@xxxxxxxxxxxxxxx 
    Sent: Wednesday, April 16, 2003 6:50 
    AM
    Subject: RE: [amibroker] AmiBroker 
    4.31.0 BETA Examples
    
    <SPAN 
    class=082024904-16042003>Thank you Steve, I will see if I can locate a 
    copy.
    <SPAN 
    class=082024904-16042003> 
    <SPAN 
    class=082024904-16042003>Regards,
     <FONT face=Arial color=#0000ff 
    size=2>Jayson 
    <FONT face=Tahoma 
    size=2>-----Original Message-----From: Steve Dugas 
    [mailto:sjdugas@xxxxxxxxx]Sent: Tuesday, April 15, 2003 11:22 
    PMTo: <A 
    href="">amibroker@xxxxxxxxxxxxxxxSubject: 
    Re: [amibroker] AmiBroker 4.31.0 BETA Examples
    Hi Jayson,
     
    Sorry to offer the help and then not be around to follow 
    through on it. But, Monday seems to roll around almost every week these 
    days, and then its off to work again. Better for you though - TJ filled 
    in for me  : - )
     
    I'm not sure what kind of book you would like, but since 
    TJ seems to follow C++ syntax, I can recommend a C++ book that I found to be 
    very good (pretty big though - over 1000 pages). It is very thorough and 
    easy to understand - definitely geared for beginners in my opinion. It is 
    "C++ Primer Plus" by Stephen Prata. I think you could probably just read up 
    on the items you are interested in if you aren't interested in learning the 
    whole language. Be careful because it seems that there are a couple of 
    other C++ books that call themselves "primers", but are definitely 
    NOT for beginners. Especially stay away from Stanley Lippman's book, at 
    least until you have some experience (take it from 
    me....please!).
     
    Steve
     
    <BLOCKQUOTE 
    >
      ----- Original Message ----- 
      <DIV 
      >From: 
      <A title=jcasavant@xxxxxxxxxxxx 
      href="">Jayson 
      To: <A 
      title=amibroker@xxxxxxxxxxxxxxx 
      href="">amibroker@xxxxxxxxxxxxxxx 
      
      Sent: Monday, April 14, 2003 10:01 
      AM
      Subject: RE: [amibroker] AmiBroker 
      4.31.0 BETA Examples
      
      <SPAN 
      class=732395813-14042003>Thank you Tomasz. I have obviously gone from 
      being fairly high on the learning curve to Newbie in just one week end 
      :(
      <SPAN 
      class=732395813-14042003> 
      <SPAN 
      class=732395813-14042003>Could you recommend a beginner level book that 
      may help some of us get up to speed with this new upgrade? I might as well 
      be reading Japanese , but I don't want to start THAT thread again 
      :))
       Jayson 
      <FONT face=Tahoma 
      size=2>-----Original Message-----From: Tomasz Janeczko 
      [mailto:amibroker@xxxxxx]Sent: Monday, April 14, 2003 3:54 
      AMTo: amibroker@xxxxxxxxxxxxxxxSubject: Re: 
      [amibroker] AmiBroker 4.31.0 BETA Examples
      Hello,
       
      While IIF works on ARRAY,
       
      if/else works on INDIVIDUAL number/boolean (element of 
      the array).
       
      Therefore you should write either
       
      a1 = IIF( C > Ref( C, -1 ), 1, 0 );
       
      (or even: a1 = C > Ref( C, -1 );
       
      or iterate:
       
      for( i = 1; i < BarCount; i++ )
      {
         if  ( Close[ i ] > Close[ i - 1 ] 
      )
             a1[ i ] = 
      1;
         else
             a1[ i ] = 
      0;
      }
       
       
      It is important to understand that IIF is a FUNCTION 
      that works on arrays,
      while if/else is control flow STATEMENT.
      Function just evaluates all arguments and returns 
      value(s)
      Control flow statement changes program 
flow.
       
      This is fundamental difference.
       
      Best regards,Tomasz Janeczkoamibroker.com
      <BLOCKQUOTE 
      >
        ----- Original Message ----- 
        <DIV 
        >From: 
        <A title=jcasavant@xxxxxxxxxxxx 
        href="">Jayson 
        To: <A 
        title=amibroker@xxxxxxxxxxxxxxx 
        href="">amibroker@xxxxxxxxxxxxxxx 
        
        Sent: Monday, April 14, 2003 7:55 
        AM
        Subject: RE: [amibroker] AmiBroker 
        4.31.0 BETA Examples
        
        <SPAN 
        class=934273705-14042003>Steve,
        <SPAN 
        class=934273705-14042003>Your example makes sense yet does not seem to 
        work for me. Else seems to be ignored . Using the IIF this would simply 
        be ......
        <SPAN 
        class=934273705-14042003>a1=iif(c>ref(c,-1),1,0);  I am 
        certainly missing something here.... your input 
        appreciated..
        <SPAN 
        class=934273705-14042003>jayson
        <SPAN 
        class=934273705-14042003> 
        <SPAN 
        class=934273705-14042003><FONT face=Arial color=#0000ff 
        size=2><IMG alt="" hspace=0 
        src="gif00215.gif" align=baseline 
        border=0>
        <SPAN 
        class=934273705-14042003> 
         Jayson 
        <FONT face=Tahoma 
        size=2>-----Original Message-----From: Steve Dugas 
        [mailto:sjdugas@xxxxxxxxx]Sent: Sunday, April 13, 2003 11:25 
        AMTo: amibroker@xxxxxxxxxxxxxxxSubject: Re: 
        [amibroker] AmiBroker 4.31.0 BETA Examples
        Hi Ken,
         
        I think the concept of loops and if-then-else is the 
        same in all languages. I imagine you  could read up on 
        it at many websites (e.g. - MSDN scripting site). Once you grasp 
        the concept, it is just a matter of using AFL syntax. You would probably 
        use it mostly for iterating your arrays if you wanted to do that. Here 
        is a simple pseudo-code - try coding it in AFL:
         
        For (SecondBar to LastBar)
          If (Today's Close > Yesterday's 
        Close)
            MyArray = 1
          Else
            MyArray = 0
        Plot MyArray
         
        Of course, please feel free to ask for 
        help!
         
        Steve
         
        ----- Original Message ----- 
        <BLOCKQUOTE 
        >
          <DIV 
          >From: 
          Tomasz 
          Janeczko 
          To: <A 
          title=amibroker@xxxxxxxxxxxxxxx 
          href="">amibroker@xxxxxxxxxxxxxxx 
          
          Sent: Sunday, April 13, 2003 
          10:39 AM
          Subject: Re: [amibroker] 
          AmiBroker 4.31.0 BETA Examples
          
          Ken,
           
          Very nice story :-)
           
          As per your request, attached is a Parabolic SAR 
          formula 
          that I have rewritten from JScript 
          version
          (<A 
          href=""><FONT 
          size=2>http://www.amibroker.com/library/detail.php?id=242<FONT 
          size=2>)
           
           
          Best regards,Tomasz 
          Janeczkoamibroker.com
          ----- Original Message ----- 
          From: "Ken Close" <<A 
          href=""><FONT 
          size=2>closeks@xxxxxxxx>
          To: <<A 
          href=""><FONT 
          size=2>amibroker@xxxxxxxxxxxxxxx<FONT 
          size=2>>
          Sent: Sunday, April 13, 2003 4:05 PM
          Subject: RE: [amibroker] AmiBroker 4.31.0 BETA 
          Examples
          > Tomasz:> 
          > As always, you have good sound advice.  
          However......> > You say, "Here is a fast sports car, 
          very versatile and powerful.  It> has 7 forward gears, but 
          if you are a beginner, do not worry....always> stay in maximum 
          of 4th gear. Plenty of nice driving is possible in 4th> 
          gear.   Wait until you become more experienced before you 
          try gears 5,> 6, and 7."> > I say, "Thank you for 
          providing such a nimble sports car, but I am in a> race, and I 
          do not think I can finish even 10th in this race, until I> get 
          out past 4th gear.  If you or others would just provide some 
          more> examples of how to use 5th and 6th gear, then I could 
          more confidently> try them. Maybe even copy your use of them. 
          Then, probably, I will have> enough experience to try 7th gear 
          on my own."> > More examples is all I am asking 
          for....my objective is not to stay in> 4th gear.> 
          > Thanks,> > Ken> > -----Original 
          Message-----> From: Tomasz Janeczko [mailto:amibroker@xxxxxx] 
          > Sent: Sunday, April 13, 2003 9:47 AM> To: <A 
          href=""><FONT 
          size=2>amibroker@xxxxxxxxxxxxxxx> 
          Subject: Re: [amibroker] AmiBroker 4.31.0 BETA Examples> 
          > Ken,> > > First, additional kudos to Tomasz 
          for another step-jump in capability> of> > 
          Amibroker.> Thank you.> > > Second, a caution, 
          in marketing terms, of having capability that is so> > hard 
          to apply for "non-programmers", beginners, and non-technical> 
          types> > that the extra capability is viewed not as an 
          advantage or benefit,> but> > just the 
          opposite.> > The beginners don't really need to jump 
          into deep water right from> the start as AFL still supports 
          "old-way" of work.> > When you write> > 
          TypicalPrice = (H+L+C) /3;> > it still operates on H, L, 
          C arrays and produces array so no> looping is needed.> 
          > New features are added as 'extra' stuff and do not> 
          change the way old statements work.> > > I apologize 
          - but may speak for many hidden lurkers - that I have just> 
          > mastered the idea that "every AFL statement only executes once", 
          but> now> > I must scramble to reorient my brain for 
          repeated iterations thru AFL> > statements.> > 
          See above - you don't need really to write loops if you don't want 
          them.> All previously written code will execute the same way as 
          before.> > Unless you use a while and/or for loop 
          nothing has really changed.> > So, you don't really need 
          to "re-orient your brain" :-)> > You can view new 
          features as a replacement of JScript/VBScript.> You may use 
          these new features only when you needed to use> scripting in 
          previous versions.> > Best regards,> Tomasz 
          Janeczko> 
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