void ManipulateDataset()
{
	
	Dataset dsAX("data1_a"), dsAY("data1_b");//data1 is the name of workbook for the first dataset, column A as x and column B as Y.
	Dataset dsBX("data2_a"), dsBY("data2_b");//data2 is the name of workbook for the second dataset, column A as x and column B as Y.
	Dataset dsCX("data3_a"), dsCY("data3_b");//data3 is the name of workbook for the results
	
	int nSize = dsAX.GetSize()> dsBX.GetSize()? dsBX.GetSize(): dsAX.GetSize();
	
	dsCX.SetSize(nSize);//Set the size of data3 as the min of data1 and data2
	dsCY.SetSize(nSize);
	
	//here is to show how to access each element of the dataset,
	//in fact, you can simply use 
	//dsCX = dsAX + dsBX;
	// to add two columns.

	for(int ii = 0; ii<nSize; ii++)
	{
		dsCX[ii] = dsAX[ii] + dsBX[ii];// x3 = x1 + x2;
		dsCY[ii] = dsAY[ii] + dsBY[ii];// y3 = y1 + y2;
	}
	
}