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<SPAN
class=885190013-03022004>Sorry if I seemed critical, really didn't mean to be,
just trying to focus on the problem I was reporting. I hope you know how
incredibly much I respect your contributions here and the detailed and
imaginative coding work you do.
<SPAN
class=885190013-03022004>
<SPAN
class=885190013-03022004>Dave
<BLOCKQUOTE
>Dave,sorry
for replying your question in "the wrong way", I will be more careful in
the future.Dimitris Tsokakis--- In amibroker@xxxxxxxxxxxxxxx, "Dave
Merrill" <dmerrill@xxxx> wrote:> Hi Dimitris, thanks for
replying, but I don't think I understand your> answer. It seems
like you're showing me the benefits of putting the> stochastic
transformation into a separate function, but you're preaching to>
the choir. I *know* why I want to do that, that's why I it *was* written
as> a function in the code I sent. I've had that StochasticTransform
function in> my standard #include file for a long time; I just made
it part of the code> itself so people could se the whole thing in
one place.> > But none of that has to do with the problem I'm
seeing. Did you run the code> I provided and look at the resulting
charts, before and after un-commenting> out those lines I
suggested? Please do try it; there's something going on> that I
don't understand, and I'd love your comments.> > Anyone else try
this?> > Dave> -----Original
Message-----> From: DIMITRIS TSOKAKIS> >
> Dave,> Suppose we want to create the
Stoch transformation for various> arrays, say MACD() and
Signal().> The first method is analytic, you have to repeat
4 lines per array> a1=Signal();t=14;>
H1=HHV(a1,t);L1=LLV(a1,t);>
st=100*(a1-L1)/(H1-L1);>
Plot(st,"StochSignal",1,1);>
a1=MACD();t=14;>
H1=HHV(a1,t);L1=LLV(a1,t);>
st=100*(a1-L1)/(H1-L1);> Plot(st,"StochMACD",2,1);>
> The function method will give the same result in an
elegant form.> Define first the st-function steps and then
apply for any array.> //The Stochastic
transformation> function st(array,t)>
{> H1=HHV(array,t);>
L1=LLV(array,t);> return
100*(array-L1)/(H1-L1);> }>
Plot(st(Signal(),14),"StochSignal",1,1);>
Plot(st(MACD(),14),"StochMACD",2,1);> > The
advantage of the function method is obvious.> Dimitris
Tsokakis> PS: Note here that this st-function is a
pseudo-stochastic, since the> arrays do not have
HLC.> Expect saturated values for both 0 or 100
limits.> --- In amibroker@xxxxxxxxxxxxxxx, "Dave Merrill"
<dmerrill@xxxx>> wrote:> > I'm
seeing a weird problem that I think may be the result of>
something I> > don't understand about variable scoping.
Check this out:> >> >
----------------------> > function StochTransform(array,
period) {> > local
LowValue;> >
LowValue = LLV(array, period);>
> return 100 * (array - LowValue) /
(HHV(array, period) -> LowValue);> >
}> >> > Diff = Signal(12, 26,
9);> > StochDiff = StochTransform(Diff,
5);> >> > //JunkIgnored =
StochTransform(C, 14); // <<< ENABLING
THIS> CHANGES Diff,> >
WHY???> > //JunkIgnored = StochTransform(Diff,
14); // <<< BUT
THIS> DOESN'T> >
----------------------> >> > First
enter it into IB as given above, look at the chart, then>
enable the> > first of the two commented out lines at
the bottom. Notice that> Diff (blue>
> histogram) changes drastically. Now enable the second one and
not> the first,> > and things go
back to "normal".> >> > I don't
get this at all. It seems like it must be due to>
interaction between> > the two calls to StochTransform,
and in fact, if you create a copy> of
the> > function called StochTransform2, and call that
the second time, no> problem.> >
Guessing further from the fact that using the same value
for> the 'array'> > parameter in both
cases also prevents the problem, most likely the>
conflict> > is with the reuse of that formal parameter
when the function is> called the> >
second time.> >> > I've never seen
this behavior before, and I don't understand it.> Among
other> > things, if it's really true that you can't call
the same function> more than> >
once without interactions like this, a lot of code I've
written> that I> > thought worked,
didn't. Or is there some simple stupid bug in this>
test that> > I'm missing?>
>> > Ideas? Tomasz?>
>> > Dave
Send BUG REPORTS to bugs@xxxxxxxxxxxxx
Send SUGGESTIONS to suggest@xxxxxxxxxxxxx
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