Re: [amibroker] Re: Easy way of finding MAX or a large list

[Tomasz Janeczko <groups@xxxxxxxxxxxxx>]

Hello,

Simplest, but repeated code:

x = Max( arr1, arr2 );
x = Max( x, arr3 );
....continued to....
x = Max( x, arr15 );

x now holds maximum of arr1... arr15

The same but this time using loop:

x = Max( arr1, arr2 );
for( n = 3; n <= 15; n++ ) x = Max( x, VarGet("arr"+n) );


Best regards,
Tomasz Janeczko
amibroker.com

On 2010-01-22 00:02, Rob wrote:
> Ok Sorry.
>
> Yes. I have a series of arrays... about 15 of them simply stored in variable names.
> I effectively want to do an array operation across all 15 to leave me with one array which will represent the maximum values across the 15 arrays.
>
> --- In amibroker@xxxxxxxxxxxxxxx, Tomasz Janeczko<groups@xxx>  wrote:
>    
>> Hello,
>>
>> That is of course **NOT** true when it comes to array variables.
>> Array-aware MAX
>>
>> x = MAX( array1, array2 );
>>
>> is orders of magnitude faster than equivalent
>>
>> for( i = 0; i<  BarCount; i++ )
>>    if( array1[ i ]>  array2[ i ] ) x[ i ] = array1[ i ];
>>    else x[ i ] = array2[ i ];
>>
>> The original poster question was far too general. He did not mention
>> if he uses arrays or not and how he defines "the list" of values.
>>
>> Best regards,
>> Tomasz Janeczko
>> amibroker.com
>>
>> On 2010-01-21 19:50, Dennis Brown wrote:
>>      
>>> For a loop, it is much faster to use an if ( var1>   var2 ) { max1 = var1; }
>>> The max operator is much slower from my tests.
>>>
>>> I don't know about configuring it for an array operator.
>>>
>>> BR,
>>> Dennis
>>>
>>> On Jan 21, 2010, at 12:50 PM, Rob wrote:
>>>
>>>
>>>        
>>>> I should have added... I'm trying to find the max value of a large list of variables...
>>>>
>>>> --- In amibroker@xxxxxxxxxxxxxxx, "Rob"<sidhartha70@>   wrote:
>>>>
>>>>          
>>>>> Is there an easy way in AFL to find the maximum value of a large list...?
>>>>>
>>>>> Is it a case of a for...next loop or nested Max() statements...?
>>>>>
>>>>> Many Thanks
>>>>>
>>>>>
>>>>>            
>>>>
>>>>
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>
>
>
> ------------------------------------
>
> **** IMPORTANT PLEASE READ ****
> This group is for the discussion between users only.
> This is *NOT* technical support channel.
>
> TO GET TECHNICAL SUPPORT send an e-mail directly to
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> http://www.amibroker.com/feedback/
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> For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
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>
> Yahoo! Groups Links
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>    


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