points with color on a scatterGraph diffenrent

Hi all

I want to score points with diffenrent color on a scatterGraph. The color of the point must be made based on the values of a combination of the primary color (red, green, blue). Perhabs I should use the 'Color.FromArgb (red, green, blue)' method to change the color. but I used the "scatterPlot.PointColor = Color.FromArgb (red, green, blue)" to change the color of the entire points on the ground. The number of points I have is more than 80,000. You have ideas better?

Respect of

Michael

Hello

You can customize the way points are drawn in the graphic Studio measure controls. See the example in chart that comes with Measurement Studio (... \Graph\CustomStyles\...).

You can customize this way...
1. write your own CustomStyle deriving from the PointStyle class.
2. override the Draw() method.
3 override the IsValueDependent property and return true.

Here is the code snippet sample showing the same thing,

Use an instance of these classes of style for scatterGraph.PlotStyle.

Point color is based on the data.
public class MyCustomStyle1: PointStyle
{
Dispersion of the cloud of points;
public MyCustomStyle1 (ScatterPlot myPlot)
{
Point cloud = myPlot;
}

Public Overrides Sub Draw (context of the object, PointStyleDrawArgs args)
{
Graphics g is args. Graphics card;
Double x = 0;
Double y = 0;

Rectangle rect = new Rectangle ((int) args.) Graphics.ClipBounds.X, (int) args. Graphics.ClipBounds.Y, (int) args. Graphics.ClipBounds.Width, (int) args. Graphics.ClipBounds.Height);

You can get the data points x and y by the reverse mapping.
scatterPlot.InverseMapDataPoint (rect, new PointF ((float) args.)) X, (float) args. Y), x, y);

Color c = Color.White; Replace the code here to map the value of your data with a color value.

g.FillRectangle (new SolidBrush (c), new Rectangle (0, 0, 100, 100));
}

public override bool IsValueDependent
{
get {return true ;}
}
}

Point color is not dependent on the data
public class MyCustomStyle2: PointStyle
{
private Random r = new Random();

Public Overrides Sub Draw (context of the object, PointStyleDrawArgs args)
{
Graphics g is args. Graphics card;
Color c = Color.FromArgb (r.Next (% 255), r.Next (% 255), r.Next (% 255));
g.FillRectangle (new SolidBrush (c), new Rectangle (0, 0, 100, 100));
}

public override bool IsValueDependent
{
get {return true ;}
}
}

I hope this helps.

Tags: NI Software

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