private void ScatterButton_Click(object sender, EventArgs e)
{
// generate some random Y data
int pointCount = 20;
double[] ys = RandomWalk(pointCount);
// create a line plot containing the data
var linePlot = new NPlot.PointPlot {
DataSource = ys
};
// add the line plot to the plot surface (user control)
plotSurface2D1.Clear();
plotSurface2D1.Add(linePlot);
plotSurface2D1.Title = $"Point Plot ({pointCount:n0} points)";
plotSurface2D1.YAxis1.Label = "Vertical Axis Label";
plotSurface2D1.XAxis1.Label = "Horizontal Axis Label";
plotSurface2D1.Refresh();
// allow the plot to be mouse-interactive
plotSurface2D1.AddInteraction(new NPlot.Windows.PlotSurface2D.Interactions.HorizontalDrag());
plotSurface2D1.AddInteraction(new NPlot.Windows.PlotSurface2D.Interactions.VerticalDrag());
plotSurface2D1.AddInteraction(new NPlot.Windows.PlotSurface2D.Interactions.AxisDrag(true));
}
public void AddPointPlot(
IEnumerable <TX> xSeries,
XAxisPosition xpos,
IEnumerable <TY> ySeries,
YAxisPosition ypos,
MarkerType _markerType,
int MarkerSize,
Color MarkerColor,
bool MarkerFilled,
bool ShowLabelInLegend)
{
NPlot.PointPlot plot = new NPlot.PointPlot();
plot.AbscissaData = xSeries;
plot.OrdinateData = ySeries;
plot.Marker = new NPlot.Marker(ToNPlotMarkerType(_markerType), MarkerSize, MarkerColor);
plot.ShowInLegend = ShowLabelInLegend;
MyPlot my = new MyPlot();
my.plot = plot;
my.XAxisPosition = xpos == XAxisPosition.Bottom ? NPlot.PlotSurface2D.XAxisPosition.Bottom : NPlot.PlotSurface2D.XAxisPosition.Top;
my.YAxisPosition = ypos == YAxisPosition.Left ? NPlot.PlotSurface2D.YAxisPosition.Left : NPlot.PlotSurface2D.YAxisPosition.Right;
plots.Add(my);
}
private void SaveFromConsoleApplication()
{
// simulate plotting from a console application
var linePlot = new NPlot.PointPlot {
DataSource = RandomWalk(20)
};
var surface = new NPlot.Bitmap.PlotSurface2D(400, 300);
surface.BackColor = Color.White;
surface.Add(linePlot);
surface.Title = $"Scatter Plot from a Console Application";
surface.YAxis1.Label = "Vertical Axis Label";
surface.XAxis1.Label = "Horizontal Axis Label";
surface.Refresh();
surface.Bitmap.Save("nplot-console-quickstart.png");
}
private void RePlot()
{
nplot.Clear();
// ensure user has selected both x and y
if (Node == null || LabelX == null || LabelY == null)
return;
//find the associated col index
int colx = -1, coly = -1, i = 0;
foreach (DataGridViewColumn col in Data.Grid.Columns)
{
if (col.HeaderText == LabelX)
colx = i;
if (col.HeaderText == LabelY)
coly = i;
i++;
}
if (colx == -1 || coly == -1)
return;
// get the data from the gridview
List<double> x = new List<double>(Data.Grid.Rows.Count);
List<double> y = new List<double>(Data.Grid.Rows.Count);
double tx, ty;
foreach (DataGridViewRow row in Data.Grid.Rows)
{
try
{
if (row.Cells[colx].Value == null || row.Cells[coly].Value == null)
continue;
tx = Double.Parse(row.Cells[colx].Value.ToString());
ty = Double.Parse(row.Cells[coly].Value.ToString());
x.Add(tx);
y.Add(ty);
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
}
nplot.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighSpeed;
//Add a background grid for better chart readability.
NPlot.Grid grid = new NPlot.Grid();
grid.VerticalGridType = NPlot.Grid.GridType.Coarse;
grid.HorizontalGridType = NPlot.Grid.GridType.Coarse;
grid.MinorGridPen = new Pen(Color.Blue, 1.0f);
grid.MajorGridPen = new Pen(Color.LightGray, 1.0f);
nplot.Add(grid);
//create a lineplot from it
NPlot.LinePlot lp = new NPlot.LinePlot();
lp.AbscissaData = x;
lp.OrdinateData = y;
nplot.Add(lp);
//point plot for showing points
NPlot.PointPlot pp = new NPlot.PointPlot();
pp.AbscissaData = x;
pp.OrdinateData = y;
nplot.Add(pp);
//format axes labels
nplot.YAxis1.Label = LabelY;
nplot.YAxis1.LabelFont = new Font(this.Font, FontStyle.Regular);
nplot.YAxis1.LabelOffsetAbsolute = true;
nplot.YAxis1.LabelOffset = 40;
nplot.XAxis1.Label = LabelX;
nplot.XAxis1.LabelFont = new Font(this.Font, FontStyle.Regular);
nplot.XAxis1.HideTickText = false;
nplot.Padding = 5;
//enable dragging etc
nplot.RightMenu = NPlot.Windows.PlotSurface2D.DefaultContextMenu;
nplot.AddInteraction(new NPlot.Windows.PlotSurface2D.Interactions.AxisDrag(false));
nplot.AddInteraction(new NPlot.Windows.PlotSurface2D.Interactions.HorizontalDrag());
nplot.AddInteraction(new NPlot.Windows.PlotSurface2D.Interactions.VerticalDrag());
nplot.Refresh();
}
