JAS3

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JAS3 is a general purpose, open-source, data analysis tool with the following features

Plotting of 1d, 2d and 3d histograms, XY plots, scatterplots etc.
High quality print output.
Fitting (binned or unbinned) using an extensible set of optimizers including Minuit.
Export of plots in a variety of formats including PS, EPS, PDF, SVG, GIF, PNG.
Easy to learn GUI for performing common analysis tasks (plotting, ntuple-analysis, fitting etc.).
More complex analysis can be performed using a variety of scripting languages (pnuts, jython, etc.), or by writing Java analysis modules.
Able to read data in a variety of formats including: SQL databases, text-files (see also HEP specific features).
AIDA compliant analysis system.
Built-in editor and compiler.
Simple spreadsheet capabilities.
Logbook for recording analysis tasks, and optionally publishing results to the web.
Highly modular structure allows addition, replacement or removal of modules to customize application for a particular problem domain.

JAS3 is a follow on from Java Analysis Studio, with extensive changes and extensions based on user feedback and experience.