RE: [amibroker] Functions and procedures

["Graham" <gkavanagh@xxxxxxxxxxxxx>]

Thanks Ara for your explanation

I am uncertain how you do this, can you provide as example of this.
" or you can define all the parameters you want as global variables and once
you call the function all variables will have the correct value "

say I have 3 variables resulting from the data

Based on 2 inputs of 
PerA = 3;
PerB = 6;

My longwinded code calculation gives output variables
Var1 
Var2
Var3

I want to compare the output variables, example

Var1(PerA) - Var1(PerB)
Var2(PerA) - Var2(PerB)
Var3(PerA) - Var3(PerB)


Cheers,
Graham
http://e-wire.net.au/~eb_kavan/

-----Original Message-----
From: Ara Kaloustian [mailto:ara1@xxxxxxxxxx] 
Sent: Tuesday, May 11, 2004 6:51 AM
To: amibroker@xxxxxxxxxxxxxxx
Subject: Re: [amibroker] Functions and procedures

Graham,

for the time being therwe is no difference between functions and procedures
in AB.

Typically Functions return one value, while Procedures return none.... and
TJ will probably implement it that way later.

In order to get multiple variable reurned, you can do it in 2 ways:

1. Make multiple calls to the function and select what to return.
Example:

function Calculate(Input1, Input2,....,returnvariable)
{
// calculate variables

returnparam
if (return variable == 1)  returnparameter = variable1;
if (return variable == 2)  returnparameter = variable2;
etc.

return returnparameter;
}


or you can define all the parameters you want as global variables and once
you call the function all variables will have the correct value

Ara

----- Original Message ----- 
From: "Graham" <gkavanagh@xxxxxxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Monday, May 10, 2004 3:32 PM
Subject: [amibroker] Functions and procedures


> The difference between functions and procedures is something I have
trouble
> understanding even after reading the descriptions in the help files.
Hoping
> someone can provide me with where procedures could be used instead of a
> function.
>
> Secondly I would like to run explorations using a fairly complex code and
> have multiple outputs. An example is I want to run various P&F codes with
> different box sizes to find various signals. My attempts have found that I
> can only get one variable out of a function. Is this correct? So far I
> basically set up the base code in an #include file and declare the input
> variable before the include statements
>
> Eg
>
> Reverse = 3  ;      // reversal requirement
> #pragma nocache
> #include "C:\Program Files\AmiBroker\AFL PF System\PnF System Base.afl"
>
> Reverse = 6  ;      // reversal requirement
> #pragma nocache
> #include "C:\Program Files\AmiBroker\AFL PF System\PnF System Base.afl"
>
> Unfortunately when I do this I must then reassign local names to the
outputs
> from the base file for each output. My system has many outputs that I use,
> eg Average column length, average bars per column, average inactive bars
> etc.
>
> Hope this is clear what I am trying to do and any help appreciated. A
> multiple output function, or another method, could save a lot of my typing
>
> Cheers,
> Graham
> http://e-wire.net.au/~eb_kavan/
>
>
>
>
>
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