KaleidaGraph’s General curve fit is based on the Levenberg-Marquardt algorithm. Our reference for this curve fit comes from Numerical Recipes in C, William H. Press, Brian P. Flannery, Saul A. Teukolsky, William T. Vetterling, Cambridge University Press. The section of this book which shows the formulas used in calculating the parameters and errors for the General curve fit is available as a PDF file.
KaleidaGraph is a thoughtfully designed graphing and data analysis application for research scientists, as well as for those in business and engineering fields. It produces publication-quality graphs, and easily converts the most complex data into a functional display.