Fityk

Fityk

Fityk 1.0.1 under Windows
Developer(s)	Marcin Wojdyr
Initial release	2004; 18 years ago (2004)
Stable release	1.3.1 / 19 December 2016; 5 years ago (2016-12-19)
Repository	github.com/wojdyr/fityk
Written in	C++
Operating system	Cross-platform
Type	Curve fitting
License	GNU GPL
Website	fityk.nieto.pl

Fityk is a curve fitting and data analysis application, predominantly used to fit analytical, bell-shaped functions to experimental data. It is positioned to fill the gap between general plotting software and programs specific for one field, e.g. crystallography or XPS.^[1]

Originally, Fityk was developed to analyse powder diffraction data. It is also used in other fields that require peak analysis and peak-fitting, like chromatography or various kinds of spectroscopy.^[2]

Fityk is distributed under the terms of GNU General Public License, but since version 1.0.0, subscription is required for downloading binaries. It runs on Linux, macOS, Microsoft Windows, FreeBSD and other platforms. It operates either as a command line program or with a graphical user interface.

It is written in C++, using wxWidgets, and providing bindings for Python and other scripting languages.

Features[]

• three weighted least squares methods:
  • Levenberg-Marquardt algorithm,
  • Nelder-Mead method
  • Genetic algorithm
• about 20 built-in functions and support for user-defined functions
• equality constraints
• data manipulations,
• handling series of datasets,
• automation of common tasks with scripts.

Alternatives[]

The programs LabPlot, MagicPlot and have similar scope.

More generic data analysis programs with spread-sheet capabilities include the proprietary Origin and its free clones QtiPlot and SciDAVis.

See also[]

• Comparison of numerical analysis software

External links[]

• Official website

References[]