non-linear

DataFitting is a statistical software that enables precise curve fitting through linear and nonlinear regression analysis.

CurveFitter is a statistical regression analysis software that estimates parameter values for linear, multivariate, polynomial, exponential, and nonlinear functions.

This software provides a range of mathematical tools such as curve fitting, nonlinear regression, treatment of data, basic statistics, and error propagation. It also allows users to create 2D and 3D graphs with confidence band, uncertainty, error bars, and conduct tests such as chi-square and correlation coefficient. Additionally, it includes a covariance matrix for extrapolation.