Re: [amibroker] Re: ABTool / multidimensional arrays, AmiBroker Email List Archive

Ed, thanks for the code. I've tried it. A very nice quick intro for OSAKA. Just a simple question. Is there a way in OSAKA to write the table to internal in stead of external memory ? Should be a hell of a lot faster ...

Regards, Ton.

----- Original Message -----

From: Edward Pottasch

To: amibroker@xxxxxxxxxps.com

Sent: Tuesday, December 29, 2009 1:11 PM

Subject: Re: [amibroker] Re: ABTool / multidimensional arrays
hi Ton,

thanks for your suggestion, I will remember it for future use. For now I seem to be able to get ahead with the Osaka plugin. It would be nice if we could define multidimensional arrays in Amibroker. I thought there have been requests for this but I can't find any in the suggestions section.

In my example code it can be seen that you can use a "Osaka" table inside a procedure but you can not pass it to the main program as a global variable multidimensional array. Therefor it needs to be saved in a file and later restored.

regards, Ed
----- Original Message -----

From: Ton Sieverding

To: amibroker@xxxxxxxxxps.com

Sent: Tuesday, December 29, 2009 1:02 PM

Subject: Re: [amibroker] Re: ABTool / multidimensional arrays
Hi Ed. I know you will not like what I am suggesting but it works. At least for me. Before using Static Arrays load a very long time series like the SP500 and use this as a 'carrier' or 'feeder' for your Static Array ... I assume you understand what I mean. I am using this trick for all cases where I need long arrays ...

Regards, Ton.
----- Original Message -----

From: Edward Pottasch

To: amibroker@xxxxxxxxxps.com

Sent: Tuesday, December 29, 2009 11:31 AM

Subject: Re: [amibroker] Re: ABTool / multidimensional arrays [1 Attachment]
hi,

I wanted to use multi dimensional arrays so that I can use a number of levels as a variable. It is impossible in Amibroker to define a variable number of arrays, or I do not know how. For instance I tried as a variable: nlev = 4;

for (k = 0; k <= nlev * 2; k++)
{
nn = (k - nlev);
global "lev" + nn;
"lev + nn = Null;
}

this does not work. So it seems you can not define a variable number of "normal" arrays.

Therefor I moved to static arrays. That seemed to work at first but I encountered problems I did not understand and now I find this in the manual: "static array variables store only as many bars as there are currently in use by given chart." Even though I use setbarsrequired(-2,-2) or setbarsrequired(sbrall) the values inside the static arrays seem to vary. It depends where you drop your cursor, what part of the chart you display how they get filled. I thought there was something wrong in my code, drives you nuts but the values in these static arrays seem all over the place, pretty much useless for my purposes. Attached code what I was trying to do. Also I get different results when using setbarsrequired(-2,-2) and setbarsrequired(sbrall).

Now I turned to the Osaka plugin but I find that you can fill and restore only 1 element at a time. You can not get an entire row at once. Am I right?

thanks, Ed
----- Original Message -----

From: Herman

To: amibroker@xxxxxxxxxps.com

Sent: Monday, December 28, 2009 9:12 PM

Subject: Re: [amibroker] Re: ABTool / multidimensional arrays
The changes made by Tomasz to the OSAKA plugin are documented in the readme.

herman

Edward Pottasch wrote:
ok thanks. I only find it in the 3-rd party area. Seems to be unchanged. Didn't know Tomasz improved it. Looks the same from when I tried it a few years ago. It has very little documentation. Will try again some day.

to reefbreak: will have a look. For now I am able to solve my problem using static arrays. I am writing a complicated scaling in and out system, at least complicated to code where at the entry signal I define levels for scaling in and out. It looks like I can do without these multi dimensional arrays and static arrays do the job.

rgds, Ed
----- Original Message -----

From: Herman

To: amibroker@xxxxxxxxxps.com

Sent: Monday, December 28, 2009 5:03 PM

Subject: Re: [amibroker] Re: ABTool / multidimensional arrays
btw, if you haven't tried the OSAKA plugin yet you should give it a try. Tomasz improved it some time in the past and it gives, if you use it is intended to be used, high performance multi-column sorting. It is fast and has full capability to save/read/import tables to/from files - also very fast. It offers an unlimited number of columns, this may enable you to simulate multi dimensional tables in a two dimensional field.

I think there are some ready to run examples in file section.

If you haven't used this plugin you are missing out on some great functions! I encourage you to try it.

herman

reefbreak_sd wrote:
You didn't state your application, so I don't know if it is relevant, but I posted a 2 dimensional sort routine in message 136551.  This routine reverse sorts tickers and an indicator value, and keeps the pairs together to be printed in the Interpretation window.

ReefBreak  

--- In amibroker@xxxxxxxxxps.com, "Edward Pottasch" <empottasch@x..> wrote:
  
ok thanks Herman. 

regards, Ed





  ----- Original Message ----- 
  From: Herman 
  To: amibroker@xxxxxxxxxps.com 
  Sent: Monday, December 28, 2009 11:21 AM
  Subject: Re: [amibroker] ABTool / multidimensional arrays


    
  The last I heard was that the developer stopped supporting it and that Tomasz wrote at some point that ABTools wasn't compatible with AB. It would be risky to use it.

  herman

  Edward Pottasch wrote: 

    hi,

    I was looking into multidimensional arrays again. I know there is the Osaka plugin but never quite figured out how to use it. However, I found this post:

    http://finance.groups.yahoo.com/group/amibroker/message/40135

    all the way from 2003. This ABTool seems just what I need and easy to understand. However it seems to have been removed. Anyone know the history on this? Why it has been removed? What is currently the status with multidimensional arrays in Amibroker?

    thanks, Ed

    
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