NLREG performs nonlinear regression and curve fitting. NLREG fits a mathematical function whose form you specify to a set of data values. Virtually any type of function can be fitted. NLREG includes a programming language similar to C that you use for describing the function to be fitted. Two dimensional line and three dimensional surface plots can be generated. The programming language includes a large selection of built-in library functions (sin, cos, log, exp, etc.) that makes it easy to describe complicated models.
Curve fitting (fit), 2D 3D Graphs, math tools
Visual Fitting 2.5.0
Math tool for curve and surface fitting.
Color Fitting 1.0
Color Fitting helps you create color schemes
Data modeling, analysis, and visualization.
DataFitting performs regression analysis