Fityk is described as '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' and is an app in the education & reference category. There are four alternatives to Fityk for a variety of platforms, including Windows, Linux, Mac, BSD and Snapcraft apps. The best Fityk alternative is LabPlot, which is both free and Open Source. Other great apps like Fityk are NumeRe, MagicPlot and PeakFit.
LabPlot is a free, open source and cross-platform Data Visualization and Analysis software accessible to everyone and trusted by professionals.
Open source framework for numerical computations and advanced statistical analysis, featuring nonlinear curve fitting, ODE solving, 1D/2D publication-quality visualization, Fourier and wavelet transforms, intuitive syntax, and namespace-based code organization for research.
MagicPlot is cross-platform application for scientific and engineering plotting, non-linear and multipeak curve fitting and batch processing. MagicPlot produces high-quality plots and offers handy plot navigation. Project files have .mppz extention.
PeakFit is a nonlinear peak separation and analysis software package for scientists performing spectroscopy, chromatography and electrophoresis.
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