Re: [amibroker] Sum Reference Not Same as Simply Adding Previous Data Points Manually

[Aron <aron.groups@xxxxxxxxx>]

have you tried:

VolumeSum = sum(Volume, 3);
VolumeSumB = ref(VolumeSum, -1);

On 3/5/2010 5:43 PM, davemabe2000 wrote:
> I'm trying to add the volume of the three previous bars (not including the current one) in my backtest.
>
> If I sum them up "manually" I get one value:
>
> VolumeSumA = Volume[i-1] + Volume[i-2] + Volume[i-3];
>
> But when I try using Sum and Ref to do it I get a different value for some reason.
>
> VolumeSumB = Sum(Ref(Volume, -1), 3);
>
> But VolumeSumA != VolumeSumB.
>
> What should I be using for Sum and Ref to get it to work properly and equal VolumeSumA above?
>
>
>
> ------------------------------------
>
> **** IMPORTANT PLEASE READ ****
> This group is for the discussion between users only.
> This is *NOT* technical support channel.
>
> TO GET TECHNICAL SUPPORT send an e-mail directly to
> SUPPORT {at} amibroker.com
>
> TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at
> http://www.amibroker.com/feedback/
> (submissions sent via other channels won't be considered)
>
> For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
> http://www.amibroker.com/devlog/
>
> Yahoo! Groups Links
>
>
>
>    



------------------------------------

**** IMPORTANT PLEASE READ ****
This group is for the discussion between users only.
This is *NOT* technical support channel.

TO GET TECHNICAL SUPPORT send an e-mail directly to 
SUPPORT {at} amibroker.com

TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at
http://www.amibroker.com/feedback/
(submissions sent via other channels won't be considered)

For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
http://www.amibroker.com/devlog/

Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/amibroker/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/amibroker/join
    (Yahoo! ID required)

<*> To change settings via email:
    amibroker-digest@xxxxxxxxxxxxxxx 
    amibroker-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    amibroker-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/