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Hi Mike,
thank you for your link.
I will try to look at it more carefully later, but just as a general
solution of the problem a function could be created to simulate
matrices of dimension 6(OHLCVI) X BarNumber (is new symbols can be
created from OLE)
By naming appropriately the new symbol, it can be related to the old
one via naming convention, and in principle also multidimensional
array could be handled by dynamically naming the symbols corresponding
to the dimensions (which is a way to implement matrices in AFL as
Tomasz pointed out somewhere)
Or may be the function could just work in terms of dynamically
variables for ex:
a[2,2] -? a_2_2
so tha for example
set(x,i,j,value){ varset(x+"_"+i+"_"+j,value);}
get(x,i,j){ return varget(x+"_"+i+"_"+j);}
(this is a just an ex, the syntax could be woring, but the idea is there)
so a[2,2]=5 would be set(a,2,2,5);
and a[2,2] get(a,2,2)
using the symbol for a u immediately get the required extrad field per
symbol provided you loop through all the bars and set(sym,i)
setA would be for vectors, setM for matrices
setM3 for tridimensional ararys and so ..
i would be nice to also write some other functions like vectorial or
matrices opeerations
I am sure somebody has already done that ...
functions to get rows and columns could also be easly coded.
if operators could be overloaded it would be nice to code a[2,2]
directly ..
I will look into your code and thank you again
Ly
--- In amibroker@xxxxxxxxxxxxxxx, "Mike" <sfclimbers@xxx> wrote:
>
> Ly,
>
> In case this is still regarding your post in message #118399 (how to
> trade only top percentile items under multiple criteria), I've gone
> and added a possible solution to that one for you.
>
> No, it's not a generic solution to extra data per symbol. But, maybe
> it will help for your percentile quest :)
>
> Mike
>
> --- In amibroker@xxxxxxxxxxxxxxx, "loveyourenemynow"
> <loveyourenemynow@> wrote:
> >
> > For convenience I would like to store some extra info for each
> symbol,
> > and I would like it to be a vector, having a value for each bar,
> which
> > could be accessed at any time via foreign functions.
> > At the moment this is possible only for OHLCV ,and I think those
> > variable are protected).
> > I could create an extra ticker for each symbol,in which to store up
> > to 5 info(using OCHLV), but I was thinking if there is a better way.
> >
> > Basically it is equivalent to set up a table, so it can be achieved
> by
> > using an external plugin or object, but even in that case I would
> need
> > to store at least one info(a handle) to link to the correct
> row/column
> > in the external table, so at least one extra info is necessary any
> > way(unless the symbol is used but that you need a system to manage
> not
> > numerical indices for arrays, like a string list of this type
> > sym1,1,sym2,2 to scan through to get the right index)
> >
> > All this is rather cumbersome but conceptually is simply the use of
> > matrices.
> >
> > This is a very general problem, which if solved allows to do
> > basically to do anything we want with vectors and matrices, and it
> is
> > also a major limitation.
> > Also a related question: when addcomposite is used on different time
> > frames does it have to be "scanned" each time in advance.
> > I thought time compression would automatically take care of it if
> > calculated just once at the lowest time resolution but I doens't
> seem so.
> >
> > Thanks
> > Ly
> >
>
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