ISeries.AddXY
ISeries

function AddXY(AX, AY: Double; Const ALabel: WideString; Value: OLE_COLOR): Integer;

Type Library
TeeChartx

Description
This function inserts a new point in the Series. The new point has X and Y values. The AXLabel parameter is optional (can be empty ''). The function returns the new point position in the Values list.

Example [Visual Basic]:

With TChart1

.AddSeries scLine

.Series(0).FillSampleValues 20

'Remove the first point

.Series(0).Delete 0

'Add a new random point

.Series(0).AddXY .Series(0).XValues.Last + 1, .Series(0).YValues.Last / .Series(0).YValues.Last - 1 + (Rnd(100) - (100 / 2)), "", clTeeColor

End With