Draco

Minor issues identified during the 1.4 Release Candidate testing period were eliminated. Issues relating to the user interface when an import/export plugin fails were corrected. MATLAB import now works with binary MATLAB files containing non-numeric data. MATLAB export functions with time-series data.

This release introduces import/export plugins, allowing users to develop scripts in JRuby to import from or export to any type of data file format. Included in this release are plugins to allow import and export of Microsoft Office Excel and MATLAB binary data files. The Probit and Logit regression code has undergone a complete overhaul, and their robustness has increased significantly after switching to an Apache Commons Math optimization engine.

The text editor now iconifies when a file is loaded. Median calculation has been fixed. Skewness and kurtosis calculations are now performed via Apache Commons Math routines. Vectors and matrices in plugins now support division by a scalar. There are minor UI improvements to the embedded text editor.

This release incorporates a new text editor component for plugin development using RSyntaxTextArea. It replaces the custom nonlinear least squares algorithm with more convergent Apache Commons Math routines. It implements a plugin wizard to aid in plugin development. Java Look and Feel is now user-definable. Help browser (HelpGUI) has been upgraded to better support opening external Web browsers on GNU/Linux and similar systems.

Unit tests have been added to ensure proper loading/saving of all possible worksheet components. Unexecuted plugins are no longer erroneously written to save files. Probit regressions are now loaded from dave files properly.