In WPF example located here:
http://www.oxyplot.org/doc/HelloWpf.html

There is same code for "Create view model" and for "Create View"...

Thanks, I have removed the duplicate code. The code-behind of the window class needs no changes.

Hello,
I seem to have an issue fixing the location and size of the Plot. is this normal or al i missing something?

My code is like this:

GPlot.Model = new PlotModel();
GPlot.Dock = DockStyle.Fill;
GPlot.Enabled = true;
GPlot.Parent = Top_Tabs.TabPages[2]; // Putting it on a Tab

// At this point the Location And Size of GPlot, are those of the containing parent

GPlot.Location = new System.Drawing.Point(279, 224);
GPlot.Size = new System.Drawing.Size(10, 10);

// Last Two lines had no effect.

this.Matlab.Controls.Add(GPlot);

thank you

Ok, i found out i forgot the Docking to Fill.

Hi, I've just discovered OxyPlot and it really looked like a great tool, but i'm having some trouble getting it up and running, specifically, when I update the plot model it does not rises the property changed event, and therefore it does not plot anything.

Here is the relevant xml

xmlns:oxy="clr-namespace:OxyPlot.Wpf;assembly=OxyPlot.Wpf"

<oxy:Plot Model="{Binding PlotData}" Margin="466,67,123,199"></oxy:Plot>

and the associated code to update PlotData

private PlotModel PlotData = new PlotModel();

            var temp = new PlotModel("Inter");
            var al1 = new OxyPlot.Series.LineSeries("Inter");

            for (int i = 0; i < Curve.GetLength(0); i++)
            {
                al1.Points.Add(new DataPoint(Curve[i, 1], Curve[i, 2]));
            }

            temp.Series.Add(al1);
            temp.Axes.Add(new OxyPlot.Axes.LinearAxis(OxyPlot.Axes.AxisPosition.Bottom, 0, maxX, "X Axis"));
            temp.Axes.Add(new OxyPlot.Axes.LinearAxis(OxyPlot.Axes.AxisPosition.Left, Min, Max, "Y Axis"));
            PlotData = temp;

I suspected that PlotData was not updating correctly, but if I do

Console.WriteLine(PlotData.ToString());

it correctly prints "Inter", if I call that same instruction before the assignment it prints a null line.

Can anyone help me to find my mistake?

Thanks a lot

Use PlotData.RefreshPlot(true); when you want to update the plot. Good luck

Hi, using your suggestion and setting the bindings to

<oxy:Plot Model="{Binding Source={StaticResource viewModel}, Path=PlotData}"  Margin="466,67,123,199"></oxy:Plot>

I got it to work.

Thank you very much!!

My xaml defining my plot.

    <Grid Style="{StaticResource ContentRoot}">
        <oxy:Plot x:Name="CloudLayerPlot" Model="{Binding CloudLayerPlotModel}" Width="600" Margin="0,0,0,0" />
    </Grid>

Some of the code behind this XAML page.

    public PlotModel CloudLayerPlotModel { get; set; }

    public cloudDetectionGraph()
    {
        InitializeComponent();
        DataContext = this;
    }

I then call this code:

        makeCloudLayerPlotModel();

private void makeCloudLayerPlotModel()
        {
            var end = new DateTime();
            end = DateTime.Now;

            var start = new DateTime();
            start = end.AddDays(-1);

            // Create data collection
            var data = new Collection<DateValue>();
            var date = start;

           // Other code here - removed as it's quite long

            plotModel1.Series.Add(lineSeries1);
            plotModel1.Series.Add(lineSeries2);
            plotModel1.Series.Add(lineSeries3);
            plotModel1.Series.Add(lineSeries4);
            CloudLayerPlotModel = plotModel1;
            CloudLayerPlotModel.RefreshPlot(true);
        }

I've tried using RefreshPlot() in different places, ie. after when I call my function to make the plotmodel. I've also tried using invalidateplot() but no joy there either. Sure it's something i'm just overlooking!

When I call this function the first time, the plot is drawn correctly, subsequent calls don't though.

I think it is just a binding problem, you should implement INotifyPropertyChanged for your main class:

YourClass :  INotifyPropertyChanged
{

          public event PropertyChangedEventHandler PropertyChanged;


        PlotModel cloudLayerPlotModel;
       public PlotModel CloudLayerPlotModel { 
             get{ return cloudPlotModel ; }
             set
              {
                    cloudPlotModel = value;
                    OnPropertyChanged("CloudLayerPlotModel");
              }
        }

       protected void OnPropertyChanged(string name)
      {
                 PropertyChangedEventHandler handler = PropertyChanged;
                 if (handler != null)
                 {
                     handler(this, new PropertyChangedEventArgs(name));
                 }
      }
}

I hope this will resolve your problem

Thank you so much!

Haya!
Labels are really required on scientific graph.
Magnitude values are not always normalized, It is strange not to be able to read value from the graph.
Or I am wrong and numerical labels can be shown? I have spent a lot of time trying to locate them.

If linear and polar axis can be shown at the same time, that will work.
(Similar problem in this post https://oxyplot.codeplex.com/discussions/434932)

Yes, this should be implemented! I have added the issue https://oxyplot.codeplex.com/workitem/10087

Hi. I'm using Oxyplot in a WPF project and am finding that my graphs are taking a while to load / update once there is only a few hundred points in them.

I am plotting 1-4 scatter series onto a time / linear graph. The ItemsSource is set to a collection of DateValues - pretty much a copy of whats in one of the examples.

Any ideas why I'm experiencing this slow down?

What MarkerType are you using? I've realized that the performance can vary noticeably. Try to use "Cross" in MarkerType. Good luck

var lineSeries1 = new LineSeries("Cloud 1")
            {
                Color = OxyColors.Transparent,
                MarkerFill = OxyColors.Black,
                MarkerStroke = OxyColors.Black,
                MarkerType = MarkerType.Circle,
                MarkerSize = 1.5,
                StrokeThickness = 1,
                DataFieldX = "Date",
                DataFieldY = "Value1",
                ItemsSource = data
            };
            var lineSeries2 = new LineSeries("Cloud 2")
            {
                Color = OxyColors.Transparent,
                MarkerFill = OxyColors.Black,
                MarkerStroke = OxyColors.Black,
                MarkerType = MarkerType.Circle,
                MarkerSize = 1.5,
                StrokeThickness = 1,
                DataFieldX = "Date",
                DataFieldY = "Value2",
                ItemsSource = data
            };
            var lineSeries3 = new LineSeries("Cloud 3")
            {
                Color = OxyColors.Transparent,
                MarkerFill = OxyColors.Black,
                MarkerStroke = OxyColors.Black,
                MarkerType = MarkerType.Circle,
                MarkerSize = 1.5,
                StrokeThickness = 1,
                DataFieldX = "Date",
                DataFieldY = "Value3",
                ItemsSource = data
            };
            var lineSeries4 = new LineSeries("Cloud 4")
            {
                Color = OxyColors.Transparent,
                MarkerFill = OxyColors.Black,
                MarkerStroke = OxyColors.Black,
                MarkerType = MarkerType.Circle,
                MarkerSize = 1.5,
                StrokeThickness = 1,
                DataFieldX = "Date",
                DataFieldY = "Value4",
                ItemsSource = data
            };
            var lineSeries5 = new LineSeries("Vertical Visibility")
            {
                Color = OxyColors.Transparent,
                MarkerFill = OxyColors.Transparent,
                MarkerStroke = OxyColors.Blue,
                MarkerType = MarkerType.Square,
                MarkerSize = 1.5,
                StrokeThickness = 1,
                DataFieldX = "Date",
                DataFieldY = "Value5",
                ItemsSource = data
            };

Mainly circles, with only the occasional square. I'll give cross a go but I really need circles!

My plot is created entirely in the view and is bound with data from the view model. When the data sets that are bound, my plot is not refreshing to redraw the data within the correct scale if I zoom or toggle the visibility of a line. So my question is how can I make sure that my graph resets to the correct size when I have zoomed or panned? If I press 'A' to reset the view before I switch the data binding the graph behaves correctly, it is just in the case when I do anything to the graph.

Any help is greatly appreciated and I hope I explained this question thoroughly.

The real question I have is how can I access the plot that is entirely set up in the xaml, through my view model, because I need to refresh the plot when the data set changes so that they axises update correctly when the data changes.

Why you set up the plot in XAML when using MVVM?

The Plot control has an InvalidatePlot method that can be called to invalidate and update the data.
There is also a command binding on the Plot.ResetAxesCommand command (I think this should be refactored to PlotCommands.ResetAxes)
You can also bind to the InvalidateFlag property - when the value is changed the plot is invalidated. I am not sure if this is a good feature, would like to get feedback on this one..
I think it is possible to use an attached property if you want to bind to the actual PlotModel.

The command is changed to PlotCommands.ResetAxes. See example in the "ExportDemo".

Thank you for the answer this was a big help.

I need to export a report and be able to change the color of some words. I've noticed that the Paragraph style is used when the report is actually being written, so I can't change it to the desired color, and then switch back to the default (black) because all will be written in black.

I've tried to convert HeaderStyles to a list instead of an array but that gave me a lot of troubles and finally a rare exception occurred. After that I just tried to increase HeaderStyles array to 25 (I will need 20 different colors + let intact the 5 default header style).

The problem is that if I set the array bigger than 9 a null reference exception occurs. I wonder if there is a better way of implementing this requirement and if not what can I do for being able to increase the array size of HeaderStyles to 25.


inside a loop:

  ParagraphStyle myStyle = new ParagraphStyle { BasedOn = reportStyle.DefaultStyle };
                               reportStyle.HeaderStyles[4 + myStyleSelector ] = myStyle ;
                              report.AddHeader(5 + myStyleSelector , "my text");

after:

   using (var w = new PdfReportWriter((dlg.FileName)))
                       {
                           w.WriteReport(report, reportStyle);
                           
                       }

HeaderStyles should only be used for headers. We could change the array to a list, but normally 5 or 6 (html limit) should be enough.
To change the color on parts of a paragraph, we need to implement Inline elements with a Style property. I have added an issue:
https://oxyplot.codeplex.com/workitem/10071

Obviously a bug; the overridden ZoomAt-Method in LogarithmicAxis.cs does not raise the Event.

I think you would need to add a RaiseAxisChanged-Method in the base Axis Class to allow the child class to raise the event?

My way of fixing it - and also dealing with another bug, which causes the AxisChanged-Event to fire before the limits are actually updated:

    Public Class LogAxis
        Inherits Axes.LogarithmicAxis

        Public Event ActualAxisChanged(min As Double, max As Double)

        Public Overrides Sub ZoomAt(factor As Double, x As Double)
            MyBase.ZoomAt(factor, x)
            RaiseEvent ActualAxisChanged(ViewMinimum, ViewMaximum)
        End Sub

        Private Sub Axis_Changed() Handles MyBase.AxisChanged
            RaiseEvent ActualAxisChanged(ViewMinimum, ViewMaximum)
        End Sub
    End Class

Thank you! I have fixed the bug and added an example to verify that it works.

Note that the UpdateActualMaxMin(); method is called - you should use ActualMaximum and ActualMinimum to get the actual limits.

Wow, that was fast, thanks a lot!