A wrap of lsqnonlin to calculate Jacobian using symbolic math toolbox. This is one of applications of symbolic math toolbox for optimization. Due to limitations of the symbolic math toolbox, the objective function must be supported by the symbolic math toolbox.
|License: Freeware||Size: 10 KB||Download (18): lsqnonlinSym Download|
zpkfit uses the nonlinear least-squares fitter (lsqnonlin) to fit an analytic model of any (fixed) number of poles and zeroes to numerical (presumably measured) frequency response data. It takes as arguments a frequency vector, a frequency response vector, and vectors of the initial guesses of...
|License: Freeware||Size: 10 KB||Download (20): zpkfit Download|
Complex step differentiation (CSD) is a superior numerical differentiation approach. Normally, it is more efficient and accurate than finite difference appraoch. This package provides a way to improve the MATLAB lsqnonlin function using the CSD.
|License: Freeware||Size: 10 KB||Download (19): lsqnonlinCSD Download|
The non-linear regression problem (univariate or multivariate) is easily posed using a graphical user interface (GUI) that solves the problem using one of the following solvers: - nlinfit: only univariate problems. - lsqnonlin: can deal with multivariate problems (more than one dependent fitting...
|License: Freeware||Size: 30.72 KB||Download (20): Non-linear regression GUI Download|
fitChiSquare is a generalized chi-square fitting routine for any model function when data measurement errors are known; it returns the model parameters and their uncertainties at the delta chi-square = 1 boundary (68% confidence interval). It also returns the chi-square and degrees of freedom...
|License: Freeware||Size: 40.96 KB||Download (19): Generalized Nonlinear Non-analytic Chi-Square Fitting Download|
Some optimization problems have very simple surfaces to optimize. The optimizer simply proceeds downhill to the unique minimizer and returns happily - all is good in the world. Sadly, more often the objective function has multiple local minimizers, you as the user provide poor starting values,...
|License: Freeware||Size: 102.4 KB||Download (18): RMSEARCH Download|
New users and old of optimization in MATLAB will find useful tips and tricks in this document, as well as examples one can use as templates for their own problems.Use this tool by editing the file optimtips.m, then execute blocks of code in cell mode from the editor, or best, publish the file to...
|License: Freeware||Size: 92.16 KB||Download (18): Optimization Tips and Tricks Download|