Korf has developed a new cubic spline interpolation method for engineering use. The main benefits of the new method are:

• It is a smooth function.
• It never overshoots intermediate values. This is essential for many engineering applications.
• It does not require solving a matrix.

The article can be downloaded by clicking on spline.pdf.

An Excel spreadsheet with a VBA implementation of this and the traditional method can be downloaded by right clicking on spline.xls.