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Hi Tim:
Your original filter statement is equivalent
to:
Filter = ROC(C, 1) > 10
Filter = ROC(C, 2) > 10
Filter = ROC(C, 3) > 10
Filter = ROC(C, 4) > 10
Filter = ROC(C, 5) > 10
Every line OVERWRITES the value of
previous line, so only the last line has effect.
The new statements are like:
Filter =0;
Filter = Filter OR ROC(C, 1) > 10
Filter = Filter OR ROC(C, 2) > 10
Filter = Filter OR ROC(C, 3) > 10
Filter = Filter OR ROC(C, 4) > 10
Filter = Filter OR ROC(C, 5) > 10
At the end, you have got the accumulative effect of all lines, which meets
your "ANY of the 1-5 passes" filter requirements.
Hope this helps,
- Mark
H.
----- Original Message -----
Sent: Sunday, April 30, 2006 12:19
AM
Subject: Re: [amibroker] Looping for
dummies
Mark,
Many thanks!
Your solution appears to work
fine, but i can't for
the life of me understand why. Would someone
mind
explaining how/why that second filter statement
works?
Tim
--- Mark H <amibroker@xxxxxxxxxxxxx>
wrote:
> I think this may work. If not, you may try to use
>
VarSet/VarGet.
>
> Filter = 0;
> for(i = 1; i < 6;
i++)
> {
> LoopROC = ROC(C, i);
>
> Filter = Filter
OR LoopROC > 10;
> AddColumn(LoopROC,"Loop" + WriteVal( (i),
1.0));
> }
>
>
> ----- Original Message
-----
> From: timgadd
> To:
amibroker@xxxxxxxxxxxxxxx
> Sent: Saturday, April 29, 2006
1:53 AM
> Subject: [amibroker] Looping for dummies
>
>
> The following feeble attempt at learning how
to
> use loops to automate
> some of my explorations
isn't working. I'm
> obviously missing a very
>
fundamental concept (probably more than a few
> fundamental
concepts).
>
> What I am attempting to do with this
test
> exploration is calculate a
> 1, 2, 3, 4, and 5
period ROC for each stock and
> return a list of all
> those stocks that pass the filter requirement for
>
ANY of the 1-5
> passes (if any of the 1-5 period ROC
values is >
> 10). What is being
> returned is a
line for each stock with all 5
> LoopROC values, but only
> for those stocks that pass the filter for the
last
> value of i ---- 5
> in this case. (I thought I
had hit the jackpot
> when I saw that I
> actually
had results that matched the test code on
> the first run!).
>
> Believe it or not, this will be a major
>
breakthrough for me if i can
> just understand how to do
this. TIA for any help
> with an explanation.
>
> ////////////////////////////
>
>
for(i = 1; i < 6; i++)
> {
> LoopROC =
ROC(C, i);
>
> Filter = LoopROC >
10;
> AddColumn(LoopROC,"Loop" + WriteVal( (i),
1.0));
> }
>
> // the following
lines are to verify the values of
> LoopROC
>
>
ROC1 = ROC(C, 1);
> ROC2 = ROC(C, 2);
>
ROC3 = ROC(C, 3);
> ROC4 = ROC(C, 4);
>
ROC5 = ROC(C, 5);
>
> AddColumn(ROC1,
"1");
> AddColumn(ROC2, "2");
>
AddColumn(ROC3, "3");
> AddColumn(ROC4,
"4");
> AddColumn(ROC5, "5");
>
>
>
>
>
>
> Please note that this group is
for discussion
> between users only.
>
> To get
support from AmiBroker please send an
> e-mail directly to
> SUPPORT {at} amibroker.com
>
>
For other support material please check also:
> http://www.amibroker.com/support.html
>
>
>
>
>
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