FSDA – Flexible Statistics Data Analysis toolbox
Developed at Università di Parma and the Joint Research Centre of the European Commission, FSDA toolbox is one of the most popular toolboxes in the MathWorks File Exchange and contains over 300 functions covering areas such as Robust Regression Analysis, Robust Multivariate Analysis and Robust Cluster Analysis. It is designed to complement the functionality of MathWorks' own Statistics and Machine Learning Toolbox.
I first wrote about FSDA toolbox on The MATLAB Blog last year when I covered one of its functions that implemented Least Median of Squares Regression but this just scratches the surface of what this toolbox can do.
FSDA is very professionally developed and disseminated. The team even publish release videos to complement the release notes when a new version is made available. Here's the video for their 2025a release
FSDA has superb documentation and a wide array of examples that include 'Open in MATLAB Online' buttons to help you get started as quickly as possible -- without you even needing to install MATLAB! It is available on both GitHub and File Exchange.
The FSDA team also work closely with us at MathWorks and often provide feature enhancement requests and bug reports for MATLAB. One recent example of this was when they the first to report the fact that the svd function slowed down by orders of magnitude for tall-and-skinny or short-and-wide matrices on Apple Silicon. They provided a short and clear demonstration of the issue that gave our developers a head-start in tracking down the underlying issue. This has now been fixed in R2025a update 1.
Many of us at MathWorks love working with the FSDA team and long may it continue.
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