How to print a single data live? #764
Description
Hello,
There is a refreshing data every 100 ms. I want to show this data on the graph but I was not successful. I can't see any data on the chart when I write it as below. I would be happy if you could help.
System.Drawing.Color color = System.Drawing.Color.FromArgb(255, 139, 26, 26);
double[] angle1Array = new double[1];
private void DispactherTimer_Tick(object sender, EventArgs e)
{
try
{
angle1Array[0] = Convert.ToDouble(angle1.Text);
dateTime = dateTime.AddMilliseconds(100);
Angle_Angle1_Graphic.plt.PlotSignal(angle1Array, 864000, xOffset: dateTime.ToOADate(), color: color, markerSize: 5);
Angle_Angle1_Graphic.plt.AxisAuto();
Angle_Angle1_Graphic.Render();
}
catch
{
}
}
I tested the growing data in the demo in my own application, I am having a similar problem. Could there be a situation about the version difference?
Version 4.0.48
Growing Data Code
public partial class MainWindow : Window
{
public double[] data = new double[100_000];
int nextDataIndex = 1;
PlottableSignal signalPlot;
Random rand = new Random(0);
private DispatcherTimer _updateDataTimer;
private DispatcherTimer _renderTimer;
public MainWindow()
{
InitializeComponent();
var signalPlot = wpfPlot1.plt.PlotSignal(data);
wpfPlot1.plt.YLabel("Value");
wpfPlot1.plt.XLabel("Sample Number");
_updateDataTimer = new DispatcherTimer();
_updateDataTimer.Interval = TimeSpan.FromMilliseconds(1);
_updateDataTimer.Tick += UpdateData;
_updateDataTimer.Start();
_renderTimer = new DispatcherTimer();
_renderTimer.Interval = TimeSpan.FromMilliseconds(20);
_renderTimer.Tick += Render;
_renderTimer.Start();
Closed += (sender, args) =>
{
_updateDataTimer?.Stop();
_renderTimer?.Stop();
};
}
void UpdateData(object sender, EventArgs e)
{
if (nextDataIndex >= data.Length)
{
throw new OverflowException("data array isn't long enough to accomodate new data");
// in this situation the solution would be:
// 1. clear the plot
// 2. create a new larger array
// 3. copy the old data into the start of the larger array
// 4. plot the new (larger) array
// 5. continue to update the new array
}
double randomValue = Math.Round(rand.NextDouble() - .5, 3);
double latestValue = data[nextDataIndex - 1] + randomValue;
data[nextDataIndex] = latestValue;
ReadingsTextbox.Text = $"{nextDataIndex + 1}";
LatestValueTextbox.Text = $"{latestValue:0.000}";
nextDataIndex += 1;
}
void Render(object sender, EventArgs e)
{
wpfPlot1.plt.AxisAuto();
wpfPlot1.Render(skipIfCurrentlyRendering: true);
}
private void DisableAutoAxis(object sender, RoutedEventArgs e)
{
wpfPlot1.plt.AxisAuto(verticalMargin: .5);
}
}