FieldTrip is an Open Source project with contributions from various individual users and research groups. If you want to contribute to the FieldTrip code, either by improving existing functions, or by implementing new functions, please consider the code guidelines and try to adhere to the existing representation of the data in the data structures.

Fieldtrip is primarily developed at the Donders Centre for Cognitive Neuroimaging (DCCN). Most people at the DCCN that use EEG or MEG in their research are using FieldTrip for (part of) their analysis. Some of these people also contribute by improving and extending the code.

The source code is maintained in Subversion/SVN, a version control system. A limited number of user has direct write access to the version control system. More details on the use of SVN for FieldTrip code management and release can be found here. All changes to the code are automatically available for the internal DCCN users, and every evening are also available in the latest version on the ftp server for the external users.

We have a seperate page where the known problems with the FieldTrip code and documentation are listed.

The remainder of this page contains documentation that pertains to the low-level development of FieldTrip. It is probably not of general interest to the typical end-users.

All changes to the code can be tracked on Twitter or Google Code.

• Revision 5239: bugfix - ensure that the original dataset files can be found, see http://bugzill
• Revision 5238: enhancement - use "ft_preamble help" to check the number of input arguments and
• Revision 5237: enhancement - cleaned up the input and output handling, use preambles, cleaned u
• Revision 5236: enhancement - allow non-detected dependencies to be specified in qsubcompile (fo
• Revision 5235: automatically synchronized identical files to revision 5234
• Revision 5234: enhancement - ensure that compiled/deployed applications do not try to change or
• Revision 5233: bugfix - prevented some deadlocks in the fieldtrip buffer do to locking order.
• Revision 5232: automatically synchronized identical files to revision 5231

• a longer history of changes to the fieldtrip main functions is available here
• reading and writing of data is done using the fileio module, see changelog
• forward modeling is done using the forward module, see changelog
• inverse source estimation is done using the inverse module, see changelog
• preprocessing (e.g. filtering and detrending) is done using the preproc module, see changelog
• support for realtime analysis is implemented using the realtime module, see changelog
• connectivity analysis is done using the connectivity module, see changelog
• multivariate analysis and classification is implemented in the multivariate module, see changelog
• spectral estimation is implemented in the specest module, see changelog