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I will second that......Windows XP home ...Sorry Tomasz, just downloaded the
upgrade and installed...
Anthony
-------Original Message-------
From: amibroker@xxxxxxxxxxxxxxx
Date: Sunday, May 04, 2003 2:48:50 PM
To: amibroker@xxxxxxxxxxxxxxx
Subject: Re: [amibroker] Tab Key fixed
Bob,
Thank you very much for the notice, you are first and only person who
acknowleadged this fact.
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
From: Bob Jagow
To: amibroker@xxxxxxxxxxxxxxx
Sent: Sunday, May 04, 2003 8:30 PM
Subject: RE: [amibroker] Tab Key fixed
Fixed it for me, Tomasz.
<< I made some changes so 'TAB' key should not wipe the contents of AFL
editor >>
-----Original Message-----
From: Tomasz Janeczko [mailto:tj@xxxxxxxxxxxxx]
Sent: Saturday, May 03, 2003 12:17 PM
To: amibroker@xxxxxxxxxxxxxxx
Subject: [amibroker] AmiBroker 4.34.2 BETA released
Hello,
A new beta version (4.34.2) of AmiBroker has just been released.
It is available for registered users only from the members area at:
http://www.amibroker.com/members/bin/ab4342beta.exe
If you forgot your user name / password to the members area
you can use automatic reminder service at: http://www.amibroker.com/login
html
CHANGES FOR VERSION 4.34.2 (as compared to 4.34.0)
improved crash recovery dialog to include AFL engine state information and
(in some cases) the source line of the formula that causes an exception
added ability to catch all exceptions in indicators and commentaries
(switchabel via Tools->Preferences->AFL, "catch system exceptions...", ON by
default) - allows you to continue to work even in case of serious problem
loop break by Shift+BREAK is now more sensitive
now you can control how often Shift+BREAK key is checked during formula
execution (Tools->Preferences->AFL, "check SHIFT+Break every" (1..100,
default = 50) (note that specifying low values may degrade performance
slightly)
tweaked AFL memory allocator hash tables to get more speed for large looping
formulas
although I never reproduced this problem I made some changes so 'TAB' key
should not wipe the contents of AFL editor anymore
Best regards,
Tomasz Janeczko
amibroker.com
AmiBroker 4.34.2 Beta Read Me
May 3, 2003 21:10
THIS IS AN EARLY BETA VERSION OF THE SOFTWARE. EXPECT BUGS !!!
AGAIN: THIS IS AN EARLY BETA VERSION OF THE SOFTWARE. EXPECT BUGS !!!
Backup your data files and entire AmiBroker folder first!
INSTALLATION INSTRUCTIONS
IMPORTANT: This archive is update-only. You have to install full version 4
30 first.
Just run the installer and follow the instructions.
Then run AmiBroker. You should see "AmiBroker 4.34.2 beta" written in the
About box.
See CHANGE LOG below for detailed list of changes.
HELP ON NEW FEATURES
USER-DEFINABLE FUNCTIONS, PROCEDURES, LOCAL/GLOBAL VARIABLES (4.34 or
higher)
Here is a sample code showing user-defined function:
// the following function is 2nd order smoother
function IIR2( input, f0, f1, f2 )
{
result[ 0 ] = input[ 0 ];
result[ 1 ] = input[ 1 ];
for( i = 2; i < BarCount; i++ )
{
result[ i ] = f0 * input[ i ] +
f1 * result[ i - 1 ] +
f2 * result[ i - 2 ];
}
return result;
}
Plot( Close, "Price", colorBlack, styleCandle );
Plot( IIR2( Close, 0.2, 1.4, -0.6 ), "function example", colorRed );
In this code IIR2 is a user-defined function. input, f0, f1, f2 are formal
parameters of the functions.
At the time of function call the values of arguments are passed in these
variables. Formal parameters behave like local variables.
Later we have result and i which are local variables. Local variables are
visible inside function only. If any other function uses the same variable
name they won't interfere between each other.
Due to the fact that AFL does not require to declare variables the decision
whenever given variable is treated as local or global is taken depending on
where it is FIRST USED.
If given identifier appears first INSIDE function definition - then it is
treated as LOCAL variable.
If given identifier appears first OUTSIDE function definition - then it is
treated as GLOBAL variable.
Example (commentary):
k = 4; // this is GLOBAL variable
function f( x )
{
z = 3; // this is LOCAL variable
return z * x * k; // 'k' here references global variable k (first used
above outside function)
}
z = 5; // this is GLOBAL variable with the same name as local variable in
function f
"The value of z before function call :" + WriteVal( z );
// Now even if we call function
// the value of our global variable z
// is not affected by function call because
// global variable z and local variable z are separate and
// arguments are passed by value (not by reference)
"The result of f( z ) = " + WriteVal( f( z ) );
"The value of z after function call is unchanged : " + WriteVal( z );
At the end of the function we can see 'return' statement that is used to
return the result to the caller. Note that currently return statement must
be placed at the very end of the function.
It is also possible to write a procedure (a function that returns nothing
(void))
procedure SinePlotter( Freq, ColorIndex )
{
pname = "Line"+WriteVal(ColorIndex,1.0);
array = sin( Cum( Freq * 0.01 ) );
Plot( array, pname , colorRed + ColorIndex, styleThick );
}
for( n = 1; n < 10; n++ )
{
SinePlotter( n/2+Cum(0.01), n );
}
Note that although there are two separate keywords 'function' and 'procedure
AmiBroker currently treats them the same (they both accept return values
but not require them), but in the future the rules maight get enforced to
use
return statement ONLY in conjunction with function keyword. So it is advised
to use function keyword in case when your function returns any value and
procedure keyword otherwise.
Note also that recursion (having a function call itself from within itself)
is NOT supported as for now.
FLOW CONTROL AND LOOPING (4.31 or higher)
while Statement
The while statement lets you repeat a statement until a specified expression
becomes false.
Syntax
while ( expression ) statement
The expression must have arithmetic (numeric/boolean) type. Execution
proceeds as follows:
The expression is evaluated.
If expression is initially false, the body of the while statement is never
executed, and control passes from the while statement to the next statement
in the program.
If expression is true (nonzero), the body of the statement is executed and
the process is repeated beginning at step 1.
This is an example of the while statement:
i = 10;while( i < 20 ){ Plot( MA( Close, i ), "MA" + WriteVal( i, 0 ),
colorBlack + i ); i = i + 1;}
The example plots 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 - bar moving
averages.
for Statement
The for statement lets you repeat a statement or compound statement a
specified number of times. The body of a for statement is executed zero or
more times until an optional condition becomes false.
Syntax
for ( init-expression ; cond-expression ; loop-expression ) statement
Execution of a for statement proceeds as follows:
The init-expression, is evaluated. This specifies the initialization for the
loop. There is no restriction on the type of init-expression.
The cond-expression, is evaluated. This expression must have arithmetic
type. It is evaluated before each iteration. Three results are possible:
If cond-expression is true (nonzero), statement is executed; then
loop-expression, if any, is evaluated. The loop-expression is evaluated
after each iteration. There is no restriction on its type. Side effects will
execute in order. The process then begins again with the evaluation of
cond-expression.
If cond-expression is false (0), execution of the for statement terminates
and control passes to the next statement in the program.
This example illustrates the for statement:
myema[ 0 ] = Close[ 0 ];for( i = 1; i < BarCount; i++ ){ myema[ i ] = 0.1
* Close[ i ] + 0.9 * myema[ i - 1 ];}
This example iterates all bars of close array to calculate exponential
moving average
if, else Statements
if( expression )
statement1
[else
statement2]
The if keyword executes statement1 if expression is true (nonzero); if else
is present and expression is false (zero), it executes statement2. After
executing statement1 or statement2, control passes to the next statement.
Example 1
if ( i > 0 )
y = x / i;
else
{
x = i;
y = abs( x );
}
In this example, the statement y = x/i; is executed if i is greater than 0.
If i is less than or equal to 0, i is assigned to x and abs( x ) is assigned
to y. Note that the statement forming the if clause ends with a semicolon.
When nesting if statements and else clauses, use braces to group the
statements and clauses into compound statements that clarify your intent. If
no braces are present, the compiler resolves ambiguities by associating each
else with the closest if that lacks an else.
Example 2
if ( i > 0 ) /* Without braces */
if ( j > i )
x = j;
else
x = i;
The else clause is associated with the inner if statement in this example.
If i is less than or equal to 0, no value is assigned to x.
Example 3
if ( i > 0 )
{ /* With braces */
if ( j > i )
x = j;
}
else
x = i;
The braces surrounding the inner if statement in this example make the else
clause part of the outer if statement. If i is less than or equal to 0, i is
assigned to x.
CHANGE LOG
CHANGES FOR VERSION 4.34.2 (as compared to 4.34.0)
improved crash recovery dialog to include AFL engine state information and
(in some cases) the source line of the formula that causes an exception
added ability to catch all exceptions in indicators and commentaries
(switchabel via Tools->Preferences->AFL, "catch system exceptions...", ON by
default) - allows you to continue to work even in case of serious problem
loop break by Shift+BREAK is now more sensitive
now you can control how often Shift+BREAK key is checked during formula
execution (Tools->Preferences->AFL, "check SHIFT+Break every" (1..100,
default = 50) (note that specifying low values may degrade performance
slightly)
tweaked AFL memory allocator hash tables to get more speed for large looping
formulas
although I never reproduced this problem I made some changes so 'TAB' key
should not wipe the contents of AFL editor anymore
CHANGES FOR VERSION 4.34.0 (as compared to 4.33.0)
user-definable functions and procedures with parameters and local variables
'A' is NO LONGER predefined symbol. I decided to remove it because people
tend to use A as user-variable forgetting the fact that it was build-in
array holding typical price (H+L+C)/3. Use 'Avg' instead.
indicator list column width increased in Indicator Builder
DayOfYear - returns the calendar day number counting from beginning of the
year January 1st is 1. Maximum number returned is 366
CHANGES FOR VERSION 4.33.0 (as compared to 4.32.2)
Database purify tool implemented (available via Tools->Database Purify)
allows to detect missing/extra quotes, possible splits, invalid OHLC
relationship
Apply to/range settings similar to AA window. You can also right click over
result list to add symbols to watch list and copy the list to the clipboard
(and paste it later to any other program for futher use)
further improvements to AFL garbage collector, now looping regardless of
loop count requires the same amount of memory as just single pass of the
code (no growing allocated memory during loops).
This enormously lowered memory consumption for some formulas and increased
the speed of some loops 3..4 times.
added variable period support to the following functions:
LinRegSlope,
LinearReg,
LinRegIntercept,
StdErr,
TSF
Sample code:
Plot( Close, "Test", colorBlack );
range = 15 * MA( ATR( 15 ), 50 ) / ATR( 15 );
//Plot( range, "range", colorBlue, styleOwnScale );
Plot( LinearReg( Close, range ), "Test", colorRed );
fixed sometimes incorrect output of variable-period version of LLV/HHV
fixed crash occuring when bad arguments were passed to the function (bug
introduced in 4.32.x).
CHANGES FOR VERSION 4.32.2 (as compared to 4.32.1)
second bug in experimental garbage collector fixed.
CHANGES FOR VERSION 4.32.1 (as compared to 4.32.0)
garbage collector was releasing memory too soon in some cases, now fixed.
CHANGES FOR VERSION 4.32.0 (as compared to 4.31.1)
added type check in IF/ELSE statements
added type check in array element assignment
error messages now numbered and display changed slightly
you can break running loop by pressing Shift+BREAK (Pause) key combination
calling COM objects works again (was broken in 4.31.x)
changed slightly the way TAB works in editor, if TAB is pressed any
selection is deselected to avoid accidential deletion of text
experimental: added 'agressive garbage collector' that extremely decreases
the amount
of memory required to run AFL formula by releasing the memory
used for temporary variables as soon as possible (previously
temporary memory was released at the end of formula execution).
A side-effect of new garbage collector is some speed up in formula execution
new tab in preferences for AFL engine settings
experimental feature, NOT for beginners, may be removed/modified in future
releases:
new _TRACE( "string" ) AFL function added
that allows to write debug messages from AFL code to system debug viewer.
(it calls internally OutputDebugString Win API function).
To view debug messages you have to run DebugView freeware program
from http://www.sysinternals.com/
CHANGES FOR VERSION 4.31.1 (as compared to 4.31.0)
fixed bug introduced in 4.31.0 causing no text output in
commentary/interpretation
CHANGES FOR VERSION 4.31.0 (as compared to 4.30.0)
Workspace window uses "icon font" set in the Windows settings instead of
hard coded Tahoma 8
for better readability and ClearType(tm) compatibility on WinXP, all dialog
windows use now 'MS Shell Dlg' face name that maps to standard MS Sans Serif
on Win 9x/Me/NT and Tahoma on Win 2K and XP.
rewritten AFL parser, now formula is parsed and coverted to syntax tree and
then interpreted. This would allow further improvements including
compilation. This allowed also to add loops/if-else statements.
implemented IF/ELSE statement, WHILE and FOR loops:
The same basic 'for' loop in AFL is 2..3 times faster than in JScript
Syntax follows C++/JScript style:
while( conditional_expression ) statement;
for( initializer_part; conditional_expression; iterator_part ) statement;
if( conditional_expression ) statement;
if( conditional_expression )
statement;
else
statement;
implemented compound statements: these are blocks of statements enclosed
in opening and closing curly brace
{
statement1;
statement2;
...
statementN;
}
compound statement can appear anywhere when simple statement can.
For example:
i = 10;
while( i < 20 )
{
Plot( MA( Close, i ), "MA" + WriteVal( i, 0 ), colorBlack + i );
i = i + 1;
}
implemented C-style postfix and prefix increment/decrement operators
i = 10;
WriteIf( i++ );
WriteIf( ++i );
WriteIf( i );
implemented array element access (subscript) operator []:
WriteVal( Close[ 0 ] ); // prints the first bar of close array
/* a sample low-level implementation of exponential moving average in AFL */
myema[ 0 ] = Close[ 0 ];
for( i = 1; i < BarCount; i++ )
{
myema[ i ] = 0.1 * Close[ i ] + 0.9 * myema[ i - 1 ];
}
added built-in constant 'BarCount' that returns number of bars available in
arrays (the number of elements of array)
When QuickAFL is turned on it may be less than true number of bars because
QuickAFL feature attempts to use only visible bars (and few before). You can
control how many bars the formula requires using SetBarsRequired() function
implemented infinite-loop protection. Nice if you forgot to increment
counter variable in 'for' loop :-)
tab key now works without need to press ALT/CTRL in AFL editors
added C-like synonyms for logical ADD/OR/NOT: &&, ||, !
/* a sample low-level implementation of Profit-target stop in AFL: */
Buy = Cross( MACD(), Signal() );
priceatbuy=0;
for( i = 0; i < BarCount; i++ )
{
if( priceatbuy == 0 && Buy[ i ] )
priceatbuy = BuyPrice[ i ];
if( priceatbuy > 0 && SellPrice[ i ] > 1.1 * priceatbuy )
{
Sell[ i ] = 1;
SellPrice[ i ] = 1.1 * priceatbuy;
priceatbuy = 0;
}
else
Sell[ i ] = 0;
}
/* sample EMA rainbow */
Plot( Close, "Price", colorBlack, styleCandle );
for( Range = 15; Range < 100; Range++ )
Plot( EMA( Close, Range ), "MA"+WriteVal(Range,0), colorRose + Range % 8,
styleNoLabel );
HOW TO REPORT BUGS
If you experience any problem with this beta version please send detailed
description of the problem (especially the steps needed to reproduce it) to
bugs@xxxxxxxxxxxxx
Send BUG REPORTS to bugs@xxxxxxxxxxxxx
Send SUGGESTIONS to suggest@xxxxxxxxxxxxx
-----------------------------------------
Post AmiQuote-related messages ONLY to: amiquote@xxxxxxxxxxxxxxx
(Web page: http://groups.yahoo.com/group/amiquote/messages/)
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Send BUG REPORTS to bugs@xxxxxxxxxxxxx
Send SUGGESTIONS to suggest@xxxxxxxxxxxxx
-----------------------------------------
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(Web page: http://groups.yahoo.com/group/amiquote/messages/)
--------------------------------------------
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Yahoo! Groups Sponsor
Send BUG REPORTS to bugs@xxxxxxxxxxxxx
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