Re: [amibroker] Re: General query about cumulating values for indicators

["Tomasz Janeczko" <groups@xxxxxxxxxxxxx>]

>> The bottom line it seems is that you cannot recursively alter the
>> value of any array by referencing other values of that array... at
>> least not directly.

Of course that you CAN. 

Recursion needs either:
a) a loop

Value1=0;
Value2=log(Close);
for( i = 1; i < BarCount; i++ ) 
  Value1[ i ] = Value1[ i -1 ] + Value2[ i ];

b) or AMA  / AMA2 http://www.amibroker.com/f?ama
Value1 = AMA2( Value2, 1, 1 );

c) or CUM (this one is limited to simple "cumulation" while above two are universal)
Value1 = Cum( Value2 );

A must read:
http://www.amibroker.com/guide/h_understandafl.html


Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message ----- 
From: "Mike" <sfclimbers@xxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Thursday, May 22, 2008 10:32 PM
Subject: [amibroker] Re: General query about cumulating values for indicators


> Nope, you're not alone.
> 
> The topic pops up, in one form or another, every couple of weeks or 
> so. Sounds like you understand the concept now.
> 
> Good luck.
> 
> Mike
> 
> --- In amibroker@xxxxxxxxxxxxxxx, "sidhartha70" <sidhartha70@xxx> 
> wrote:
>>
>> Thanks Mike.
>> 
>> So it seems I'm not the only one coming from more 'traditional'
>> languages to struggle with this concept.
>> 
>> The bottom line it seems is that you cannot recursively alter the
>> value of any array by referencing other values of that array... at
>> least not directly.
>> 
>> 
>> --- In amibroker@xxxxxxxxxxxxxxx, "Mike" <sfclimbers@> wrote:
>> >
>> > Read thread #122034 for a similar discussion, including 
> explanation. 
>> > 
>> > Mike
>> > 
>> > --- In amibroker@xxxxxxxxxxxxxxx, "sidhartha70" <sidhartha70@> 
>> > wrote:
>> > >
>> > > Hi All,
>> > > 
>> > > Can someone clear this up for me... I am simply trying to 
> cumulate 
>> > the
>> > > value of an array. My intial thoughts were to do something like 
> the
>> > > following,
>> > > 
>> > > Value1=0;
>> > > Value2=log(Close);
>> > > Value1=Ref(Value1,-1)+Value2;
>> > > 
>> > > However, that doesn't seem to work... So I've ended up with,
>> > > 
>> > > Value2=log(Close);
>> > > Value1=Cum(Value2);
>> > > 
>> > > Which does seem to work. I can't see why the first doesn't.
>> > > 
>> > > Can anyone explain...? Thanks
>> > >
>> >
>>
> 
> 
> 
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