Hello, I have 2 questions:

1 - What is the best way to put some labels on a 2D chart like those one in red in my attachment? This red ones I used paint just as an example.\


2 - The horizontal axes, I couldnt find out how to give a better precision, I have only 2 divisions (0,1) but I want more like from -0.2, -0.1 ... 1.0 , 1.2...

Thank you in advance!

Hi Andre,

1 - What is the best way to put some labels on a 2D chart like those one in red in my attachment? This red ones I used paint just as an example.
You can use two approaches:

1.1. Create a point series with invisible data point and add data labels to it:

   NChart chart = nChartControl1.Charts[0];

   NPointSeries point = new NPointSeries();

   point.DataLabelStyle.Format = "<label>";
   point.DataLabelStyle.VertAlign = Nevron.VertAlign.Center;
   point.DataLabelStyle.TextStyle.BackplaneStyle.Visible = false;
   point.DataLabelStyle.TextStyle.StringFormatStyle.HorzAlign = Nevron.HorzAlign.Left;
   point.DataLabelStyle.TextStyle.StringFormatStyle.VertAlign = Nevron.VertAlign.Top;
   point.DataLabelStyle.ArrowLength = new NLength(0);

   point.FillStyle = new NColorFillStyle(Color.Transparent);
   point.BorderStyle.Width = new NLength(0);
   

   point.Values.Add(10);
   point.XValues.Add(10);
   point.Labels.Add("Label 1");

   point.Values.Add(20);
   point.XValues.Add(20);
   point.Labels.Add("Label 2");

   point.Values.Add(30);
   point.XValues.Add(30);
   point.Labels.Add("Label 3");

   chart.Series.Add(point);

1.2. Use custom painting (All Examples\Custom Painting).

2. The horizontal axes, I couldnt find out how to give a better precision, I have only 2 divisions (0,1) but I want more like from -0.2, -0.1 ... 1.0 , 1.2...
Most likely you're using the ordinal scale - you should switch to linear:

NLinearScaleConfigurator xScale = new NLinearScaleConfigurator();
chart.Axis(StandardAxis.PrimaryX).ScaleConfigurator = xScale;

is has lot's of options for tick step etc, but the default settings should also work fine.

Hope this helps - let us know if you meet any problems.

Best Regards,
Nevron Support Team