Onyx is a free software environment for creating and estimating structural equation models (SEM). It provides a graphical user interface that facilitates an intuitive creation of models, and a powerful back end for performing maximum likelihood estimation of parameters. Path diagrams in Onyx can be exported to OpenMx, lavaan, and Mplus to allow an easy transition to script-based SEM software. Onyx was written by Timo von Oertzen and Andreas M. Brandmaier and is freely distributed under the Apache 2.0 license.
You can download the current (unstable) version of Onyx from this repository. The most recent version is automatically regularly built and deployed here. Download the JAR-file and run it. Note that Onyx requires a recent JAVA runtime environment, such as OpenJDK.
This section is only for developers. As an Onyx user, you can safely ignore this information. If you want to build Onyx from sources, download the sources, make sure that you have a Java development kit ready (including a Java compiler) and the Apache ant build tool. Then, compile the source code using
ant compile
Then, package all compiled classes into a single jar file by issuing:
ant dist
This creates a single file onyx.jar in subfolder dist.
After you have successfully created the distributable jar file, you can run it from the command line:
cd dist
java -jar onyx.jar
Onyx is made available under the Apache 2.0 license.
Onyx uses various (unmodified) libraries, which are here redistributed under their original licenses:
- vectorgraphics2d by Erich Seifert is distributed under the LGPL
- Diff Match and Patch by Google Inc is distributed under the Apache License 2.0
- GRAL by Erich Seifert is distributed under the LGPL
- jtouchbar by Thizzer is distributed under the MIT license
- jUnit by junit.org is distributed under the Eclipse Public License 1.0
Furthermore, Onyx uses the following resources:
- the mono icons by https://icons.mono.company/ distributed under the MIT license