How does Excel smooth chart data when smooth option is selected?

[Larry]

When I graph data in an Excel spreadsheet and select data series format,
there is a check box for "smoothed line". I would like to know what type of
smoothing is performed to produce the resulting curve. Thanks

 

[Tushar Mehta]

When I graph data in an Excel spreadsheet and select data series format,
there is a check box for "smoothed line". I would like to know what type of
smoothing is performed to produce the resulting curve. Thanks

Visit Brian Murphy's http://www.xlrotor.com/resources/files.shtml and
check out the Smooth_curve_bezier_example_file.xls file.