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Hi Kut2k2,
Thanks for your reply.
As you said, I think it is going to be difficult to implement in Metastock.
The formula you gave to me is different.
The main purpose is to classify (ascending order) a time series (ie : 100
values) and then pick the 50th(x) and 51th(y) values.
Then, the result (median) would be :(x+y)/2
The median returns a number which divides in two the sample (values above
it/below it).
Thanks for your help,
Regards,
Karile
----- Original Message -----
From: "kut2k2" <kut2k2@xxxxxxxxx>
To: <Metastockusers@xxxxxxxxxxxxxxx>
Sent: Tuesday, May 06, 2003 6:44 PM
Subject: [Metastockusers] Re: How to calculate this ?
> --- In Metastockusers@xxxxxxxxxxxxxxx, "Karile" <karile@xxxx> wrote:
> >
> > Hi,
> >
> > I would like to know if it is possible with Mestatock to calculate a
> median
> > (statistically speaking) :
> >
> > The median is the middle number (value) in any given set of numbers
> (values)
> > :
> >
> > For example :
> >
> > A set of values :
> >
> > 20 45 10 3 90 19
> >
> > 1) We have to classify (rising order) these values : so
> >
> > 3 10 19 20 45 90
> >
> > 2) Because we have an even set of numbers ( 6 values) :
> >
> > We take the value 19 and the value 20 :
> >
> > (19+20)/2 = 19.5 = MEDIAN
> >
> > 3) for an odd set of numbers
> >
> > Let's take the same set of numbers but with 5 values (odd number) :
> >
> > 20 45 10 3 90
> >
> > We classify :
> >
> > 3 10 20 45 90
> >
> > MEDIAN = 20 (the number which divides in two the set of numbers)
> >
> >
> > Is it possible to do the same thing thing with Metastock (I would
> like to do
> > it with 100 values) ?
> >
> > Any help appreciated,
> >
> > Regards,
> >
> > Karile
>
> Hi, Karile
>
> I don't know what exactly your intention here is of course but if your
> 100 values represent the lookback period of a time series, you're
> probably defeating your purpose. A 100-bar median filter would have
> approximately the same result as a 100-bar moving average with the
> same disadvantage: about 50 bars of lag.
>
> I use a 3-bar median filter as a "prefilter" or "preprocessor" when I
> make indicators of price velocity in order to "snap off the jaggies"
> because velocity is noisier than raw price. The cost is only one bar
> of lag, but that is more than paid back by being able to use a shorter
> MA on the smoother output of the prefilter.
>
> There is a general-purpose median algorithm somewhere on the Net but
> it is pretty complicated and probably involves looping. For short
> medians, there are more efficient algorithms.
>
> For the 3-bar median filter:
>
> Median := Max(Max(Min(P, Ref(P,-1)),Min(P, Ref(P,-2))), Min(Ref(P,-1),
> Ref(P,-2)));
>
> HTH,
> kut2k2
>
> > ----- Original Message -----
> > From: "Roy Larsen" <rlarsen@xxxx>
> > To: <Metastockusers@xxxxxxxxxxxxxxx>
> > Sent: Monday, May 05, 2003 10:43 PM
> > Subject: Re: [Metastockusers] BINARY WAVE COMPOSITE
> >
> >
> > > Debra Ann
> > >
> > > I should have written the conditions as "condition A" etc.
> Following is
> > the
> > > same code with real conditions which you need to replace with your
> own.
> > This
> > > is for demonstration only.
> > >
> > > If( C>Ref(HHV(C,5),-1) ,1,0)+
> > > If( C>Ref(HHV(C,10),-1) ,2,0)+
> > > If( C>Ref(HHV(C,15),-1) ,4,0)+
> > > If( C>Ref(HHV(C,20),-1) ,8,0);
> > >
> > > Roy
> > >
> > > ----- Original Message -----
> > > From: "Debra Ann Petitan" <DrDAP@xxxx>
> > > To: <Metastockusers@xxxxxxxxxxxxxxx>
> > > Sent: Tuesday, May 06, 2003 7:33 AM
> > > Subject: Re: [Metastockusers] BINARY WAVE COMPOSITE
> > >
> > >
> > > >
> > > > Roy,
> > > >
> > > > I received an error message saying "condition" is not a
> recognized name
> > or
> > > operator. Do I leave that word out of the formula?
> > > >
> > > > Thank you,
> > > > Debra Ann
> > > > --- "Roy Larsen" <rlarsen@xxxx> wrote:
> > > > >Debra Ann
> > > > >
> > > > >It is quite easy to set up a "sort of" binary wave that assigns
> > different
> > > > >values to the different conditions. This could be rather
> confusing with
> > > > >negative numbers but I've used the following format to help
> quickly
> > > identify
> > > > >which signals were true.
> > > > >
> > > > >If(condition "A",1,0)+
> > > > >If(condition "B",2,0)+
> > > > >If(condition "C",4,0)+
> > > > >If(condition "D",8,0);
> > > > >
> > > > >The possible results are 0 through 15.
> > > > >
> > > > >In the example above a summed value of 10 tells us that
> conditions B
> > and
> > > D
> > > > >are true. A value of 3 results from A and B. Once beyond four
> > components
> > > the
> > > > >mental maths gets a little harder.
> > > > >
> > > > >Roy
> > > > >
> > > > >> On page 289 of the 8.0 MetaStock manual, a composite Binary
> Wave is
> > > > >> listed.
> > > > >> Is there a way of distinguishing each wave from the other so
> when the
> > > > >> wave is generated at 1, 2, or 3, you would be able to tell
> which
> > > > >> indicator was not in agreement with the other three. Or if
> only 1 is
> > > > >> +/-1 which indicator that would be?
> > > > >> Could something be color coded or named or a number assigned
> to each
> > > > >> indicator to reflect its identity?
> > > > >> If this is possible, would someone please write the
> additional lines
> > > > >> necessary to accomplish this goal?
> > > > >>
> > > > >> Thank you very much.
> > > > >> Debra Ann
> > > > >>
> > > > >>
> > > > >>
> > > > >> To unsubscribe from this group, send an email to:
> > > > >> Metastockusers-unsubscribe@xxxxxxxxxxx
> > > > >>
> > > > >>
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> > > > >>
> > > > >>
> > > > >
> > > > >
> > > > >
> > > > >
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