private Task<IGrid> OpenGrid( )
{
OpenFileDialog openFileDialog = new OpenFileDialog
{
Filter = "Text files|*.csv",
ValidateNames = true
};
var fileName = openFileDialog.ShowDialog( ) == true ? openFileDialog.FileName : null;
var reader = new CsvGridReader( 1024 * 1024, ';' );
return Task<IGrid>.Factory.StartNew( ( ) => fileName != null ? reader.Read( fileName, false, false ) : null );
}
public async void InitPlot( )
{
var reader = new CsvGridReader( 1024, ';' );
OpenFileDialog openFileDialog = new OpenFileDialog
{
Filter = "Text files|*.csv",
ValidateNames = true
};
var column = 0;
var fileName = openFileDialog.ShowDialog( ) == true ? openFileDialog.FileName : null;
if ( fileName == null )
{ return; }
var grid = await Task<IGrid>.Factory.StartNew( ( ) => reader.Read( fileName, false, false ) );
double left = double.MaxValue, right = double.MinValue;
for ( int i = 0; i < grid.RowCount; ++i )
{
var value = grid.GetValue( i, column );
left = left < value ? left : value;
right = right > value ? right : value;
}
var quantizer = new Quantizer( left, right );
var empirical = new EmpiricalDistribution( grid, column );
var q = await Task<IQuantization>.Factory.StartNew( ( ) => quantizer.Quantize( 15, 1e-3, empirical ) );
var zero = new LineSeries
{
Color = OxyColor.FromRgb( 0, 0, 0 ),
StrokeThickness = 1
};
zero.Points.Add( new DataPoint( left, 0 ) );
zero.Points.Add( new DataPoint( right, 0 ) );
plot.Series.Add( zero );
var func = new FunctionSeries( x => empirical.Density( x ), left, right, 1e-2 );
plot.Series.Add( func );
foreach ( var border in q.Borders )
{
var line = new LineSeries
{
LineStyle = LineStyle.Dash,
Color = OxyColor.FromRgb( 0, 0, 0 ),
StrokeThickness = 1
};
line.Points.Add( new DataPoint( border, 3e-1 ) );
line.Points.Add( new DataPoint( border, -3e-2 ) );
plot.Series.Add( line );
}
foreach ( var code in q.Codes )
{
var line = new LineSeries
{
LineStyle = LineStyle.Dash,
Color = OxyColor.FromRgb( 140, 140, 140 ),
StrokeThickness = 0.5
};
line.Points.Add( new DataPoint( code, 3e-1 ) );
line.Points.Add( new DataPoint( code, -3e-2 ) );
plot.Series.Add( line );
}
var codes = from code in q.Codes
select new ScatterPoint( code, empirical.Density( code ) );
var points = new ScatterSeries
{
MarkerType = MarkerType.Circle,
MarkerStroke = OxyColor.FromRgb( 2, 133, 230 )/*( 255, 0, 0 )*/,
MarkerFill = OxyColor.FromRgb( 2, 133, 230 )/*( 255, 115, 41 )*/
};
points.Points.AddRange( codes );
plot.Series.Add( points );
PlotView.Model = plot;
}
