AmiBroker 5.91.0 BETA Read Me

February 10, 2015 12:43

THIS IS A 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 5.90 first.

Just run the installer and follow the instructions.

Then run AmiBroker. You should see "AmiBroker 5.91.0 BETA" written in the About box.

See CHANGE LOG below for detailed list of changes. Note that only changes that affect end-user directly are listed here. Internal code changes/refactoring is usually not mentioned.

CHANGE LOG

CHANGES FOR VERSION 5.91.0 (as compared to 5.90.1)

• AFL/Charts: GfxSetCoordsMode( 1 ) now works with logarithmic scale too.
• AFL: added "Warning 505. Division by zero" (level 2 warning). It detects divison by zero in arrays too and prints which array element was zero
• AFL: failed COM type conversion is reported as a regular error within editor/log window instead of displaying message box
• AFL: new field in SetOption("WarningLevel", x ); -- allows to change warning level. Level 1 is default for all AFL executions with exception of AFL editor and commentary where warning level is set to 4
  Warning Level
  1 - report only level 1 warnings (502- too much plots)
  2 - report level 1 and 2 warnings (above plus assignment within conditional, division by zero, threadsleep period too long)
  3 - report level 1, 2 and 3 warnings (above plus createobject/createstaticobject )
  4- report all warnings (default for the AFL editor)
  
• AFL: new function AddRow("text") to add a raw text row to the exploration (allows outputing things without respecting Filter and without being limited to number of bars). This function is preliminary and its parameters are subject to change.
  
  SetOption("NoDefaultColumns", True );
Filter = 1;
AddColumn( Close, "Column1" );
AddColumn( Null, "Column2" );

for( i = 0; i < 10; i++ )
{
 AddRow( StrFormat( "row %g\tsecond column", i ) );
}
  
• AFL: new functions SparseCompress( query_points, data ) /SparseExpand( query_points, data )
  
  only_when = ( Month() % 2 ) == 0; // even months only

x = SparseCompress( only_when, Close ); // compact sparse data

y = MA( x, 10 ); // regular calculation

y = SparseExpand( only_when, y ); // expand sparse data

Plot( C, "Price", colorDefault, styleBar );
Plot( y, "Sparse MA from even months", colorRed );


function SparseCompressEquiv( sparse_array, data_array )
{
   result = Null;
  
   j = BarCount - 1;
   for( i = BarCount - 1; i >= 0; i-- )
   {
     if( sparse_array[ i ] ) result[ j-- ] = data_array[ i ];
   }
  
   return result;
}

function SparseExpandEquiv( sparse_array, data_array )
{
   result = Null;
  
   j = BarCount - 1;
   for( i = BarCount - 1; i >= 0; i-- )
   {
     if( sparse_array[ i ] ) result[ i ] = data_array[ j-- ];
   }
  
   return result;
}
• AFL: NumToStr protected against user error of specifying precision higher than provided by IEEE standard (display never exceeds 7 significant digits, rest is padded with zeros)
• AFL: the engine displays more verbose error in case when GetArraySymbolCopy fails
• Analysis: CSV Export speeded up 100+ times. Now exporting large files takes seconds instead of hours. Export speeds on ordinary hard disks > 80MB/sec
• Charts: Interval Lock added (so now you can lock symbol or interval or both)
• Commentary window - warning level raised to 4 (report all warnings in commentary window)
• Sort() could crash with IndexMode = True and start parameter was greater than zero. Fixed.
• When chart pane is being resized/dragged, real-time chart refreshes are temporarily held to prevent disappearing of tracking rectangle
  

If you experience any problem with this beta version please send detailed description of the problem (especially the steps needed to reproduce it) to support at amibroker.com