# About Plot

## History

A long time ago in the last millennium I wrote a program called *SciPlot* for the fantastic NeXT computers (the older ones of you maybe remember).

After the NeXT period I had the idea to make a similar program for windows computers. After some work on this I did not
find any fun in programming for Windows computers and so I stopped the development of *SciPlot* for Windows.

Now we have Mac OS X and I started the *Plot* project which takes some of the ideas of *SciPlot* but is a completely rewritten program with a different focus than *SciPlot*.

## Sources

### Spline Fit

Freestyle data fitting

Barend J. Thijsse

June, 2006; fulltext

Barend J. Thijsse, Spline V6.0 Tutorial and User Manual

Feb. 2002, Delft University of technology

Carl de Boor, A Practical Guide to Splines

(Springer, 1978).

J. Durbin and G.S. Watson,

Biometrika 37 (1950) 409, Biometrika 38 (1951) 159, and Biometrika 58 (1971) 1

in Chapter IX of Mark A. Hollanders, Thesis TU-Delft (1990)

Barend J. Thijsse, Mark A. Hollanders, and J. Hendrikse,

A practical algorithm for least-squares spline approximation of data containing noise

Computers In Physics, Jul/Aug (1998).

### Spline Interpolation

Formelsammlung zur Numerischen Mathematik mit C-Programmen

G.Engeln-Muellges and F.Reuter

### Smooth

based on least square fit

A.Savitzky & M.J.E. Golay

Anal. Chem. 1964, 36,1627-1639

### FFT (Fast Fourier Transform)

Numerical Recipes in C

W.H.Press, B.P.Flannery, S.A.Teukolsky, W.T.Vetterling

Cambridge University Press

### FFT Smooth & Differentiation

Numerical Recipes in C

W.H.Press, B.P.Flannery, S.A.Teukolsky, W.T.Vetterling

Cambridge University Press

### Curve Fit

Numerical Recipes in C

W.H.Press, B.P.Flannery, S.A.Teukolsky, W.T.Vetterling

Cambridge University Press

( implemented by *W.Mahdi* )

Gauss-Lorentz
R.O. Ansell, T. Dickinson, A.F. Povey, and P.M.A. Sherwood

J.Electroanal.Chem. 98:79-89 (1979)

Doniach-Sunjic

S. Doniach, and M. Sunjic,

J.Phys. [C] 3:285-291 (1970)

Exponential Tail

D.Briggs and M.P.Seah

Practical Surface Analysis by Auger and X-Ray Photoelectron Spectroscopy

## Co-Author(s)

### Prof. Dr. Barend J. Thijsse

Department of Materials Science and Engineering, Delft University of Technology

E-Mail: B.J.Thijsse@tudelft.nl