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Harry
The point with IsDefined() is that if Equis had constructed it properly so
that it could output 0, 1, or indicator value, then it would have been a
really useful function. Unfortunately it's limited functionality means that
it's a lot less useful than it could have been.
In theory it is a really useful function but in practice it is incapable of
doing the very things one would have thought it was designed to do - provide
a zero value from a function prior to the data being valid, and then
providing the actual function value.
Any code left outside the Isdefined() causes the very problem that
IsDefined() should fix, but having only binary outputs when it contains the
code completely defeats its potential use.
MS 6.52 didn't have the IsDefined() and IsUndefined() functions and was none
the worse because of it.
Sorry that I haven't a solution for your problem.
Roy
----- Original Message -----
From: "bex1210" <hmw3@xxxxxxxxxxxxxx>
To: <equismetastock@xxxxxxxxxxxxxxx>
Sent: Sunday, June 29, 2003 5:00 AM
Subject: Re: [EquisMetaStock Group] IF () statement question
> Roy:
>
> Thanks for the prompt reply. I had looked at the IsDefined() function, but
as I understand it, it only returns a "1" or a "0"; not the value of the
underlying formula. So I could not see how to make it useful.
>
> You reference "procedures that already worked in 6.52". Since ver 8 is my
first Metastock, I don't know these historical procedures. Could you
elaborate, or direct me to where I might find something? I had searched
several Metastock forums, as well as lists of formulas (Guppy, etc.) but
could never find anything that seemed to fit my needs.
>
> Harry
>
> --- In equismetastock@xxxxxxxxxxxxxxx, "Roy Larsen" <rlarsen@xxxx> wrote:
> > Harry
> >
> > This is exactly the situation that a properly implemented IsDefined()
> > function would solve. Unfortunately the implementation is half baked and
> > therefore of no use at all, other than simplifying procedures that
already
> > worked in 6.52.
> >
> > Sorry I can't be more help.
> >
> > Roy
> >
> > ----- Original Message -----
> > From: "bex1210" <hmw3@xxxx>
> > To: <equismetastock@xxxxxxxxxxxxxxx>
> > Sent: Saturday, June 28, 2003 5:21 AM
> > Subject: [EquisMetaStock Group] IF () statement question
> >
> >
> > > I am in the process of creating a Diffusion Index for Fidelity Select
> > Funds. I am using a weekly period. (I have Metastock 8.01 EOD) The
formula
> > is a series of IF () statements, using the Security () function to
reference
> > each of the specific funds. It simply sums the results. That is, if
today's
> > close on each of the 40 funds is higher than it's close 39 weeks ago,
the
> > Indicator would plot 100. If none of today's close are higher, it would
plot
> > 0. The results are normally between 10 and 90. I have listed the basic
setup
> > at the bottom of this message.
> > >
> > > My problem is caused by the fact that Fidelity continually adds new
Funds
> > to their Select list. Although most have been around since 1991, some
were
> > new in 1999 and 2000. If, for example on the list below, FSAVX was new
on
> > 1/1/2000, then the earliest the formula would plot ANY indicator is 39
weeks
> > after 1/1/2000, even if all of the other funds on the list were started
in
> > 1991. Apparently, if any of the IF () statements cannot compute due to
lack
> > of data, then the complete formula doesn't function, and nothing is
plotted.
> > >
> > > What I would like is a setup so that if an IF () statement does not
> > compute, only it is ignored, and the rest of the formula functions, and
the
> > indicator plots.
> > >
> > > Does anyone know how I can accomplish this?
> > >
> > > (I realize that my "B" variable would not be correct, since I would
not
> > have the funds counted correctly, but for my use, that would be much
better
> > than having no indicator at all.)
> > >
> > >
> > > Thanks in advance for your help,
> > >
> > > Harry
> > >
> > > **************************
> > > A:=-Input("LookBack (Weeks) ?",2,999,39);
> > > DA:=Input("Funds in Index ?",2,99,40);
> > > B:=(100/DA);
> > >
> > > If(Security("FSAIX",C)>Ref(Security("FSAIX",C),A),B,0)+
> > > If(Security("FSAVX",C)>Ref(Security("FSAVX",C),A),B,0)+
> > > If(Security("FSRBX",C)>Ref(Security("FSRBX",C),A),B,0)+
> > > If(Security("FBIOX",C)>Ref(Security("FBIOX",C),A),B,0)+
> > > If(Security("FSLBX",C)>Ref(Security("FSLBX",C),A),B,0)+
> > > If(Security("FBSOX",C)>Ref(Security("FBSOX",C),A),B,0)+
> > > etc., etc.
> > > ************************************
> > >
> > >
> > >
> > > To unsubscribe from this group, send an email to:
> > > equismetastock-unsubscribe@xxxxxxxxxxxxxxx
> > >
> > >
> > >
> > > Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
> > >
> > >
> > >
> > >
>
>
>
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>
>
>
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>
>
>
>
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