The toolbox regtools provides three functions for performing linear and non linear regression analysis.

The regtools module provides the following functions:

- linregr() : an interactive user interface for linear regression analysis, including plot facilities and the most relevant statistical information at the solution.
- nlinregr() : an interactive user interface for performing non linear (weighted) regression analysis. Also here plot facilities and statistical information are available. Both functions can be called in silent command line mode.
- nlinlsq() : a more flexible non linear (weighted) regression analysis function – called by nlinregr(). nlinlsq() uses the scilab function optim() for solving the regression problem. Supports both analytical and numerical derivatives.
- qqplot() : quantile-quantile plots.

**Download on ATOMS.**

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