Platforms to show: All Mac Windows Linux Cross-Platform
Required plugins for this example: MBS ChartDirector Plugin
You find this example project in your Plugins Download as a Xojo project file within the examples folder: /ChartDirector/curvefitting
This example is the version from Sun, 17th Mar 2012.
Project "curvefitting.xojo_binary_project"
Class App Inherits Application
Const kEditClear = "&Löschen"
Const kFileQuit = "Beenden"
Const kFileQuitShortcut = ""
End Class
Class PicWindow Inherits Window
EventHandler Sub Open()
// Use random table to generate a random series. The random table is set to 1 col
// x 51 rows, with 9 as the seed
dim rantable as new CDRanTableMBS(9, 1, 51)
// Set the 1st column to start from 100, with changes between rows from -5 to +5
rantable.setCol(0, 100, -5, 5)
// Get the 1st column of the random table as the data set
dim data as CDArrayMBS = rantable.getCol(0)
// Create a XYChart object of size 600 x 300 pixels
dim c as new CDXYChartMBS(600, 300)
// Set the plotarea at (50, 35) and of size 500 x 240 pixels. Enable both the
// horizontal and vertical grids by setting their colors to grey (&hc0c0c0)
call c.setPlotArea(50, 35, 500, 240).setGridColor(&hc0c0c0, &hc0c0c0)
// Add a title to the chart using 18 point Times Bold Itatic font.
call c.addTitle("LOWESS Generic Curve Fitting Algorithm", "timesbi.ttf", 18)
// Set the y axis line width to 3 pixels
c.yAxis.setWidth(3)
// Add a title to the x axis using 12 pts Arial Bold Italic font
call c.xAxis.setTitle("Server Load (TPS)", "arialbi.ttf", 12)
// Set the x axis line width to 3 pixels
c.xAxis.setWidth(3)
// Set the x axis scale from 0 - 50, with major tick every 5 units and minor tick
// every 1 unit
c.xAxis.setLinearScale(0, 50, 5, 1)
// Add a blue layer to the chart
dim layer as CDLineLayerMBS
layer = c.addLineLayer
// Add a red (&h80ff0000) data set to the chart with square symbols
layer.addDataSet(data, &h80FF0000).setDataSymbol(c.kSquareSymbol)
// Set the line width to 2 pixels
layer.setLineWidth(2)
// Use lowess for curve fitting, and plot the fitted data using a spline layer
// with line width set to 3 pixels
data.lowess
dim d(-1) as Double
dim i,count as integer
count=data.count-1
for i=0 to count
d.Append data.getvalue(i)
next
call c.addSplineLayer(d, &h0000ff).setLineWidth(3)
// Set zero affinity to 0 to make sure the line is displayed in the most detail
// scale
c.yAxis.setAutoScale(0, 0, 0)
// Output the chart
Backdrop=c.makeChartPicture
End EventHandler
End Class
MenuBar MenuBar1
MenuItem FileMenu = "&Ablage"
MenuItem FileQuit = "#App.kFileQuit"
MenuItem EditMenu = "&Bearbeiten"
MenuItem EditUndo = "&Rückgängig"
MenuItem UntitledMenu1 = "-"
MenuItem EditCut = "&Ausschneiden"
MenuItem EditCopy = "&Kopieren"
MenuItem EditPaste = "&Einfügen"
MenuItem EditClear = "#App.kEditClear"
MenuItem UntitledMenu0 = "-"
MenuItem EditSelectAll = "&Alles auswählen"
End MenuBar
End Project
The items on this page are in the following plugins: MBS ChartDirector Plugin.