Steema Central

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			double[] y = { 0, 1, 2, Double.NaN, 4, 5, Double.NaN, 7, 8, Double.NaN };

			points1.DefaultNullValue =  0;
			points1.TreatNulls = Steema.TeeChart.Styles.TreatNullsStyle.DoNotPaint;

			for (int i = 0; i < y.Length; i++)
			{
				if (Double.IsNaN(y[i]))
				{
					points1.Add(points1.DefaultNullValue, Color.Transparent);
				}
				else
				{
					points1.Add(y[i]);
				}
			}

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double [] YValues = new double [2500000];
double [] XValues = new double [2500000];

//Populating the double arrays with data

//Actually, i dont need to populate the double array here. 
//One out side component will create the double array and will give it to me
//I will be just using the array without modifying it.

_FastLine.XValues.Count = XValues.Length;
_FastLine.XValues.Value  = XValues;
_FastLine.YValues.Count = YValues.Length;
_FastLine.YValues.Value  =  YValues;                  //Assigning value like this does not make any copy.
                                                                       //So we know how much memory will be used
                                                                       //in that case it is
                                                                       // 2500000 * 8 * 2 = 40 MB.

//Setting Null for the NaN data indices
//_Tag.NullIndexes is a list of indexes for NaN data.
//that also is given to me by outside component.

for (i = 0; i < _Tag.NullIndexes.Count; i++)
{
    _FastLine.SetNull(_TagInfo.NullIndexes[i]);    //This call modifies the actual data. That is the problem.
}

TeeChart.Series.Add(_FastLine);

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		/// <summary>
		///Sets the specified series point to a null (transparent) point. 
		/// </summary>
		public void SetNull(int valueIndex)
		{
			SetNull(valueIndex, true);
		}

		/// <summary>
		/// Toogles between null (transparent) and regular point.
		/// </summary>
		/// <param name="valueIndex">Point index</param>
		/// <param name="isNull">If true, transform to null point, otherwise transform to normal point.</param>
		public void SetNull(int valueIndex, bool isnull)
		{
			Colors[valueIndex] = isnull ? Color.Transparent : Utils.EmptyColor;
		}

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			double[] y = { 0, 1, 2, Double.NaN, 4, 5, Double.NaN, 7, 8, Double.NaN };

			points1.DefaultNullValue = 0;
			points1.TreatNulls = Steema.TeeChart.Styles.TreatNullsStyle.DoNotPaint;

			for (int i = 0; i < y.Length; i++)
			{
				if (Double.IsNaN(y[i]))
				{
					points1.Add(5);
					points1.SetNull(i);
				}
				else
				{
					points1.Add(y[i]);
				}
			}

Code: Select all

			double[] x = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
			double[] y = { 0, 1, 2, Double.NaN, 4, 5, Double.NaN, 7, 8, Double.NaN };

			points1.DefaultNullValue = 0;
			points1.TreatNulls = Steema.TeeChart.Styles.TreatNullsStyle.DoNotPaint;

			points1.XValues.Count = x.Length;
			points1.XValues.Value = x;
			points1.YValues.Count = y.Length;
			points1.YValues.Value = y;

			for (int i = 0; i < y.Length; i++)
			{
				if (Double.IsNaN(y[i]))
				{
					points1.SetNull(i);
				}
			}