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OK. Yes, need
selectedvalue.
----- Original Message -----
Sent: Tuesday, January 13, 2009 7:42
AM
Subject: Re: [amibroker] Re: Finding the
last true value in an array...
Have you tried it or are just "not sure"?
Works for me and can move to any bar and get the "selectedvalue". If in
doubt use selectedvalue(sum()).
----- Original Message -----
Sent: Tuesday, January 13, 2009 6:01
AM
Subject: [amibroker] Re: Finding the
last true value in an array...
Actually Bill, not sure this works... since the 3rd argument
in
ValueWhen() is required to be a number and not an array.
Could use
LastValue() to turn it into a number, but of course this
only returns the
value from the right hand edge of the chart... so it
wouldn't work
historically... which is what I need.
Any thoughts...?
--- In
amibroker@xxxxxxxxxxxxxxx,
"wavemechanic" <timesarrow@xxx> wrote:
>
> How about
this?
>
> x = condition that generates your 1,0 array
> y
= sum(x, range)
> z = valuewhen(x, barindex(), y)
> position in
array = lastvalue(barindex()) - z + 1
>
>
Bill
> ----- Original Message -----
>
From: sidhartha70
> To: amibroker@xxxxxxxxxxxxxxx
> Sent: Monday, January 12, 2009 6:33
PM
> Subject: [amibroker] Re: Finding the last true value
in an array...
>
>
> Sorry Barry... my
terminology is confusing...
>
> Lets say I have an
array that has only true or false values in it...
>
> Lets say the last 10 value of this array are as
follows, from x
> intervals ago until now...
>
> 0,1,0,0,1,0,0,1,0,0
>
x.................Now
>
> Now, obviously,
BarsSince(array) will return a value of 2... i.e. the
>
last true value was 2 intervals ago.
>
> However,
the value I'm trying to get is the last value of true in
the
> above x elements of the array... so I want an
_expression_ that returns
> 8 for the above array (i.e. 8
intervals back is the last value of
> true). Any
ideas...?
>
> Hopefully that's clearer now.
>
>
> --- In amibroker@xxxxxxxxxxxxxxx,
"Barry Scarborough" <razzbarry@>
>
wrote:
> >
> > What are your
trying to do? HHV gives the value of the highest high
>
> over the period you enter in x. If you want to find how far
back
that
> > is you can use
>
>
> > bs = BarsSince(H == HHV(H,
10));
> > // the next line prints the num bars back and
the high of that bar
> > printf(NumToStr(bs, 1.0) + "
High " + NumToStr(HHV(H, 10), 1.2));
> >
> > If you want to find the value of the other things
bs bars ago then
> > you can
> >
// use the following. This applies to any array
> >
lastHigh = ref(High, - bs);
> > // this is another way
to see the results that shows the high value
> >
Plot(lastHigh, "high bars ago", colorBlack);
> >
Plot(Ref(C, -bs), "close bars ago", colorblue);
> >
Plot(Ref(MA(C, 10), -bs), "MA(10) value bars ago",
colorGreen);
> > // then look at what valuewhen
returns
> > Plot(ValueWhen(H == HHV(H, 10), H, -1),
"ValueWhen", colorRed);
> >
> >
bsolutely the last thing you want to do is start using loops,
such as
> > for loops, to extract data from ABs arrays. Your
code will be much
> > cleaner and faster if you use
straight AFL.
> >
> > Your
terminology true value is confusing. The value in an array is
> > the true value. Do you mean what was the value
when the
condition was
> >
true?
> >
> >
Barry
> >
> >
> >
> > --- In amibroker@xxxxxxxxxxxxxxx,
"sidhartha70" <sidhartha70@>
> >
wrote:
> > >
> > >
Graham,
> > >
> > > I'm
trying to get my head around that code right now... but
first
> > > thing I noticed was that my post was
poorly worded. Let me
reword it
> > > below, and
maybe you can tell me if this is what you thought I
>
> meant....
> > >
> > >
Ok. It's easy to find the first occurrence of a true value of
an
> > > array... that is looking from now backwards
x intervals. simply
> > > HHV(array,x) where x=no of
intervals back.
> > >
> > >
However, how can I find the last true value of the array looking
> > back
> > > over x
intervals...?? i.e. the first true value starting from
x
and
> > > looking forward to
now.
> > >
> > > is there
an array method without looping...?
> > >
> > > Many Thanks
> > >
> > >
> > > --- In amibroker@xxxxxxxxxxxxxxx,
Graham <kavemanperth@> wrote:
> > >
>
> > > > try this
> >
> > array = h;
> > > > LastHHVValue =
valuewhen( hhvbars(array,x)==0, array );
> > > >
> > > > --
> > > >
Cheers
> > > > Graham Kav
>
> > > AFL Writing Service
> > > > http://www.aflwriting.com
>
> > >
> > > >
> >
> >
> > > > 2009/1/13 sidhartha70
<sidhartha70@>:
> > > > > Hi
All,
> > > > >
> > >
> > Ok. It's easy to find the last true value of an
array...
simply
> > > > > HHV(array,x)
where x=no of intervals back.
> > > >
>
> > > > > However, how can I find the
last true value of the array
> > looking
back
> > > > > over x
intervals...??
> > > > >
>
> > > > is there an array method without
looping...?
> > > > >
> >
> > > Many Thanks
> > > >
>
> > > > >
> > >
>
> > >
> >
>
>
>
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__._,_.___
**** IMPORTANT ****
This group is for the discussion between users only.
This is *NOT* technical support channel.
*********************
TO GET TECHNICAL SUPPORT from AmiBroker please send an e-mail directly to
SUPPORT {at} amibroker.com
*********************
For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
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