Steema Central

Posted: **Fri Jun 22, 2012 8:41 pm**

Is there a way to set the starting Y value where X/Y intersect? I have the need to show the lowest value from the Y Axis in the chart. I should note that this chart has both area and line within one chart. Also to note is that this is using the iOS Tchart library.

I have tried a couple different ways including:

Setting automatic to false and then specifying the left minimum and maximum values
areaLY.Chart.Axes.Left.Automatic = false;
areaLY.Chart.Axes.Left.Minimum = Math.Round(areaLY.Chart.Axes.Left.MinYValue);

lineTY.Chart.Axes.Left.Automatic = false;
lineTY.Chart.Axes.Left.Minimum = Math.Round(lineTY.Chart.Axes.Left.MinYValue);

areaLY.Chart.Axes.Left.Maximum = Math.Round(areaLY.Chart.Axes.Left.MaxYValue);
lineTY.Chart.Axes.Left.Maximum = Math.Round(lineTY.Chart.Axes.Left.MaxYValue);

The second method:

areaLY.Chart.Axes.Left.SetMinMax(Math.Round(areaLY.Chart.Axes.Left.MinYValue),areaLY.Chart.Axes.Left.MaxYValue);
lineTY.Chart.Axes.Left.SetMinMax(Math.Round(lineTY.Chart.Axes.Left.MinYValue),lineTY.Chart.Axes.Left.MaxYValue);

In the attached screen shot the lowest value is actually 932, so I want to show 900 where x/y intersect in the chart. Currently you'll see in the chart the starting value is 1000.

Posted: **Tue Jun 26, 2012 11:59 am**

Hello Toolbox,

Can you tell us if next code help you to solve your problem:

Code: Select all

     public Form1()
        {
            InitializeComponent();
            InitializeChart();
        } 
        Steema.TeeChart.Styles.Line lineTY;
        Steema.TeeChart.Styles.Area areaLY;
        private void InitializeChart()
        {
            double max, min;
            tChart1.Aspect.View3D = false;
            areaLY = new Area(tChart1.Chart);
            lineTY = new Line(tChart1.Chart);
    
            areaLY.Color = Color.Green;
            areaLY.Transparency = 50;
            lineTY.Color = Color.Red;
            lineTY.LinePen.Width = 2;
            tChart1.Axes.Left.Grid.Visible = false;
            areaLY.AreaLines.Visible = false;
            Random rnd = new Random();
            for (int i = 0; i < 52; i++)
            {
                areaLY.Add(i, rnd.Next(1500));
                lineTY.Add(i, rnd.Next(1500));
            }

            max = Math.Max(areaLY.MaxYValue(), lineTY.MaxYValue());
            min = Math.Min(areaLY.MinYValue(), lineTY.MinYValue());

            tChart1.Axes.Left.SetMinMax(min, max);

Note, that my code is in Winforms and you need adapt it to TeeChart for iOs. Also, can help you to achieve as you want is change the Min/Max offset value,e.g change 0 to 1.

Thanks,

Steema Central

Method to set starting Y value in Left Axes

Method to set starting Y value in Left Axes

Re: Method to set starting Y value in Left Axes