Hide data point on x axis at location "0" in win chart controls

Question

I am plotting graph as shown in the image below. On x axis i dont have location "0", can i hide that point. The values on x axis vary from -35 to 35 where 0 is not present. The x axis values are just numbers.

Answer 1

You can't freely change the text of the axis labels nor skip any of them nor make them transparent selectively.

But there are two options:

• You can replace the axis labels by CustomLabels. This means you need to create and add them all, each with two numbers which give a FromPosition and a ToPosition, i.e. a range inside of which the CustomLabel shall be centered.

Often you can cheat and use an actual x-value and simply subtract / add a small value; not too small so that the label still fits in.

If you have explicitly set the axis Interval (as you seem to have done) 1/2 or 1/3 of that would be good offsets; or if you also have set Minumum and Maximum you can calculate the range properly in loop, see below!

• But in your case the solution is much simpler: you can format the axis label like this:

---

Axis ax = yourChartArea.AxisX;
ax.AxisX.LabelStyle.Format = "#";

Of course this only work because the value you want to hide is 0, which the number format can suppress.

---

The first option, of course is much more powerful. So let's look at an example for this option as well:

double delta = ax.Interval / 3d;
for (double x = ax.Minimum; x <= ax.Maximum; x+=ax.Interval)
{
    CustomLabel cl = new CustomLabel();
    cl.ToPosition = x + delta;
    cl.FromPosition = x - delta;
    cl.Text =  x.ToString();  // pick your text/format!
    if (x != 0) ax.CustomLabels.Add(cl);
}

The result looks the same for both methods:

Answer 2

In case you are databinding X and Y axis using two arrays, find the location within the X axis array where the value for zero should be and add the X and Y axis values as follows:

xaxisarray(z) = 0.0        'In case of a double type array
yaxisarray(z) = Double.NaN 'Add a value that is not a number

Also make sure to resize the X and Y axis array before adding the above values, and move the values one step as shown below:

System.Array.Resize(Of Double)(xaxisarray, xaxisarray.Length + 1)
System.Array.Resize(Of Double)(yaxisarray, yaxisarray.Length + 1)
For i As Integer = xaxisarray.Length - 1 To z + 1 Step -1
    xaxisarray(i) = xaxisarray(i - 1)
    yaxisarray(i) = yaxisarray(i - 1)
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