Category Archives: News

Updated Website

We've updated the website to help make things easier to find. Look here for all information regarding what RTXI is and does, and for sources and other tutorials, head over to our GitHub site.

Also, look forward to the upcoming release of RTXI 2.0.

RTXI v1.4 Released

This version of RTXI includes new modules, bug fixes, and introduces RTXI's Patch Clamp Electrophysiology Suite. This marks a new initiative with RTXI, for our team to develop module suites to experimental paradigms common to the user base. A detailed list of the changes can be found here.

For the majority that has installed RTXI through the use of our Live CDs, the COMEDI and Qwt sources must be installed prior to compiling RTXI. The upgrade instructions can be found here.

For those who have installed RTXI manually will find the upgrade process relatively simple. It requires updating the source code through SVN in the RTXI directory

$ sudo svn update

and installing a new dependency, Qwt (installation instructions here).

Updated MATLAB functions for HDF5

A tutorial on using HDF5 files and a collection of MATLAB functions are available here:
RTXI HDF5 Matlab Files

It is no longer necessary to use the rtxi_hdf_matlabize utility if you are using these functions. These functions were re-written to use a low-level API to extract the dataset for synchronous channels rather than the "load" function to map the dataset to native MATLAB structures.

(Update 12/20/2012 - A bug fix has been applied to the previous script due to issues when >= 10 trials were recorded)

RTXI Update: New COMMENT Datatype for DefaultGUIModel

RTXI v1.2 now has a COMMENT type for Workspaces that also works for DefaultGUIModel. RTXI v1.2 is currently only available as the latest SVN code from our Sourceforge site. It is NOT the version of RTXI on the Live CDs. The DefaultGUIModel is described in this tutorial. While a PARAMETER can be a double or integer datatype, a COMMENT is a string datatype. Comments will be recorded by the RTXI Data Recorder, but unlike PARAMETERS should not be accessed in real-time. This capability will allow users to save text alongside their real-time data for creating user logs. To update to the latest version of RTXI, grab the source code from the Sourceforge SVN repository. In the directory where you would like to keep RTXI, eg. /home/USER or /opt (it does not have to be where you store your own model files):

$ svn co rtxi

If you do not have subversion and you are using Ubuntu:

$ sudo apt-get install subversion

Inside the /rtxi directory:

$ sudo ./
$ sudo ./configure
$ sudo make
$ sudo make install

Workshop at Nineteenth Annual Computational Neuroscience Meeting CNS*2010

We will be hosting a workshop at the Nineteenth Annual Computational Neuroscience Meeting CNS*2010 which is taking place in San Antonio, TX from July 24th-30th, 2010. The exact date and time of the workshop is still to be determined but it will be held on either July 29th or 30th.

Organizers: John White (University of Utah), David Christini (Cornell), and Robert Butera (Georgia Tech)

RTXI is an open-source, real-time Linux-based dynamic clamp system ( While real-time Linux systems have a reputation of being difficult to install and use, we believe RTXI overcomes such issues. In this workshop, an introductory talk will describe the system, and two applications talks
will demonstrate its utility. Next, workshop participants will receive a bootable USB stick (containing a live Ubuntu-based RTXI system) with which to test drive RTXI on their laptops.

Agenda (3 hours)

(30 minutes) Introduction to RTXI: Risa Lin (graduate student, Georgia Tech)
(30 minutes) Science Application 1: Dr. Tay Netoff (University of Minnesota)
(30 minutes) Science Application 2: Dr. Fernando Fernandez (University of Utah)
(1.5 hours) Interactive tutorial, using live RTXI USB system on users’ laptops, with assistance from RTXI