ERPLAB Toolbox is a free, open-source Matlab package for analyzing ERP data. It is tightly integrated with EEGLAB Toolbox, extending EEGLAB’s capabilities to provide robust, industrial-strength tools for ERP processing, visualization, and analysis. A graphical user interface makes it easy for beginners to learn, and Matlab scripting provides enormous power for intermediate and advanced users.
To install ERPLAB v6.1.4, download the zip file (linked above), unzip and place the folder in the 'plugins' folder of your existing EEGLAB installation (e.g. ~/Documents/MATLAB/eeglab13_6_4b/plugins/erplab6.1.4/). Additional installation help can be found here.
To run ERPLAB, ensure that the correct EEGLAB folder is in your current Matlab path, and run eeglab as a command from the Matlab Command Window. Find our tutorial here..
We encourage most users to use this latest major version.
We anticipate that ERPLAB will work with most recent OSs, Matlab versions and EEGLAB versions.
- We recommend a 64 bit OS, 64 bit Matlab, and at least 4 GB RAM. Most modern computers meet this.
- The Matlab Signal Processing Toolbox is required
- Entering in the command
verin the Command Window will produce a list of installed toolboxes. Check this list to see whether the Signal Processing Toolbox is installed
- Entering in the command
- Caution: EEGLAB v11 is not recommended.
Find installation help here
Here is a list of some confirmed-working environments for ERPLAB.
ERPLAB v6.1.4
| OS | Matlab | EEGLAB | Working? |
|---|---|---|---|
| Mac OS X 10.11.5 'El Capitan' | Matlab R2015a | EEGLAB v13.5.4b | ✓ |
| Mac OS X 10.11.4 'El Capitan' | Matlab R2016a | EEGLAB v13.5.4b | ✓ * |
| Windows 7 | Matlab R2014a | EEGLAB v13.5.4b | ✓ |
| Windows 8.1 | Matlab R2014a | EEGLAB v13.5.4b | ✓ |
| Windows 10 | Matlab R2015a | EEGLAB v13.5.4b | ✓ |
| Ubuntu 14.04 LTS | Matlab R2014a | EEGLAB v13.5.4b | ✓ |
* - (but with some non-critical warnings)
Some additions and minor bugfixes, including:
- Removing channels can now avoid deleting all channel location information
- More channel location tools
- Measurement Window GUI now fits on a smaller screen
- Improvements in 'Preprocess Continuous EEG' options
- Fixed a bug where the number of loaded erpsets would be mistakenly taken to be zero
- Improved Current-Source-Density compatibility
- Replaced the error 'Quack' noise with a beep, and replaced some error pictures.
Minor bugfixes, including:
- Cleaned up the Measurement Viewer text and options
- Measurement Viewer helper text now only shown when relevant
Minor bugfixes, including:
- Fixed BDF Library url-link in BDF-Visualizer
- Swapped artifact and user-flag display in BDF-Visualizer
Minor bugfixes, including:
- Shift Event Codes GUI fix - now doesn't crash on launch.
- Adopted [Major].[Minor].[Patch] version numbers, this being v6.1.1, with backward-compatible file loading. Note - from v6.0, we no longer indicate the file type usage in the version number, and this is now always taken to be 1.
The new Shift Event Codes tool has been updated so that when you shift event codes beyond a continuous EEG boundary marker (e.g. -99, "boundary" event codes) then that code will be deleted
We have fully migrated of all our ERPLAB documentation (i.e. manual, tutorial, etc) now to Github, and so have now updated the help links in ERPLAB.
With ERPLAB v6.0, we include a variety of new features, user-interface improvements, bug-fixes, and improvements to existing functions. Among these, we have:
EEG or ERP data can be used to compute an estimate of the Current Source Density (CSD). We include new functions to take data loaded in ERPLAB (either EEG or ERP) and compute the CSD data. We use CSD methods from Jürgen Kayser (from the CSD Toolbox).
These tools can be found in the new 'ERPLAB -> Data Transformations' menu. A new ERPLAB dataset is generated, with CSD data in the place of EEG/ERP data.
In the ERP Measurement tool, ERPLAB can record measurements of local peaks and the time of a fractional peak, like 50% peak. Previously, this fractional peak measurement was taken from the 'onset' of the peak, before the peak. In v6.0, ERPLAB also has an option to measure the fractional peak 'offset', the 50% peak value after the peak.
For more easy editing, ERPLAB documentation has been moved to a wiki here.
With the new Delete Time Segments tool you can now remove segments of irrelevant continuous EEG data, like data recorded during breaks in the experiment.
With the new Shift Event Codes tool you can now time-shift specific event codes either to either earlier or later timepoints in the EEG data. This tool was created to counter the delay between visual stimulus onset on the monitor and its corresponding event code recorded in the EEG data.
The new Selective Electrode Interpolation tool is based off of EEGLAB's own interpolation function and adds the ability to specify which electrodes to use as input for interpolation.