[Eeglabnews] EEGLAB (4.3) with DIPFIT (1.0) plugin new available
Arnaud Delorme
arno at sccn.ucsd.edu
Fri Dec 5 22:02:55 PST 2003
Announcing a new update of EEGLAB (4.3) featuring the new DIPFIT (1.0)
plug-in
available from http://sccn.ucsd.edu/eeglab/
============================================================
DIPFIT - dipole fitting of independent component (or other scalp) maps
in Matlab, callable from the EEGLAB menu
DIPFIT was written by Robert Oostenveld
(www.miba.auc.dk/~roberto/header.html) of
Aalborg University and F.C. Donders Centre
Aalborg, Denmark Nimejen, The Netherlands
and was integrated into EEGLAB by Robert Oostenveld and Arnaud Delorme
with Scott Makeig at SCCN, Institute for Neural Computation, UCSD
DIPFIT functions allow users to fit independent component (or other) maps
to single- or dual-symmetric dipole models in an arbitrary four-shell
spherical
head model (with head model parameters used in BESA are defaults). Both
automated (one-click) and manual (exhaustive and/or iterative) search modes
are supported. Results may be visualized using the enhanced dipplot()
function.
Batch-mode processing is supported. A new DIPFIT tutorial appendix is also
available at http://sccn.ucsd.edu/eeglab/dipfittut/dipfit.html
The DIPFIT plug-in is included in EEGLAB v4.3. Three other EEGLAB
plug-ins are now
available for separate download from
http://sccn.ucsd.edu/eeglab/plugins.html
1. BESA fit - Fit single and dual-symmetric dipole models to independent
component maps using BESA (Megis Software, GmbH) running outside Matlab.
2. BIOSIG import: Import data files in several data formats (requires
the BIOSIG toolbox
(biosig.sourceforge.net) of Alois Schloegel. If EEGLAB can't import
it, try BIOSIG!
3. EEP import: Contributed by the Ant Software company (ant-software,nl)
to import
their .eep format data.
The version updates below were contributed or suggested by several
EEGLAB users including
Robert Oostenveld, Petr Janata, Rufin VanRullen, Vladimir Litvak,
Johannes Sarnthein,
Chris Jetton, Jed Meltzer. We intend shortly to invite participation
in an EEGLAB
developers email list for those interested in developing EEGLAB as a
general open source
platform for advanced EEG and MEG data analysis.
****** The new version (4.3) of EEGLAB includes several other
significant changes: ******
* EEG.urevent: removed automatic urevent structure building for
pre-existing datasets.
!!WARNING!!: Datasets created under EEGLAB 4.1 and loaded into
4.2 had an
EEG.urevent structure created automatically. IF some data
containing events
had been rejected BEFORE this time, then the urevent structure
information
IS INCOMPLETE (i.e. to some degree wrong!). Most new datasets
created under 4.2
had the urevent structure saved correctly when the event
information was first
added. Be cautious about using urevent information from legacy
4.1 datasets.
* eeg_time2prev(): first (commandline) function to use urevent
information. Returns the
delay in ms from each event of one or more specified ('target')
type(s) to the
last preceding event of one or more specified ('previous')
type(s). Uses the
EEG.urevent and EEG.event().urevent structures. Useful for
selecting event subsets
or as an epoch sorting variable ('sortvar') in erpimage().
* DIPFIT: Added DIPFIT toolbox of Robert Oostenveld as included plug-in.
Fits component
maps to single or dual-symmetric dipoles in a spherical head *
model
* eeg_hist(): add local history for each EEG dataset.
* pop_editset(): fixed command line call error (thanks to Vladimir Litvak).
* pop_readbdf(): fixed error when using default parameter in graphical
interface.
* eeg_checkset(): fixed minor problem for urevents.
* envtopo(): fixed compnum problem for pvaf.
* eeg_eegfilt(): fixed nargin problem (thanks to Petr Janata).
* tftopo(): fixed significance threshold for visualizing ITC.
* erpimage(): phase sorting now removes baseline before computing phase
(thanks to Rufin VanRullen).
* erpimage(): added 'erpalpha' flag to plot ERP bootstrap significance
limits.
This test works as follows: A distribution is computed of
surrogate
trial averages summing the input trials with randomly flipped
signs.
The specified (two-sided) significance level is estimated from this
distribution, and plotted in red
* erpimage(): made 'auxvar' plotting work with 'ampsort','phasesort',
and 'plotamps'
* erpimage(): added argument 'horz' to overplot horizontal lines at
indicated epoch numbers
* erpimage(): non-significant data ranges (erp, amp, itc) are now shown
in filled background blue
* loadcnt(): latest version (v4.2) could not read files with no events.
Fixed this.
* eegplugin_besa(): fixed saving dipoles in the multiple dataset structure.
* pop_epoch(): automatically add time-locking events if no event in data
trials.
fixed bug when epoching without including time 0.
* runica(): added 'compvars' (mean component vars) as 3rd output arg;
moved activations to 7th output argument.
* topoplot(): added 'noplot',[radius angle] option to return an
interpolated value
for a single [missing] channel. Not recommended for use with
very many
data points, nor for channel locations at/off the edge of the
electrode array.
* pop_headplot(): filing load file problem under windows.
* pop_chanlocs(): fixed history for channel center optmization; updated
read electrode file gui;
Added "Append" button; updated coordinate conversion buttons.
Fixed polhemusx and polhemusy error.
* pop_comperp(): fixing function crash for grand ERP in one condition
(thanks to Vladimir Litvak).
* spec(), eegfiltfft(): new functions to replace functions from the
Signal Processing toolbox
for users who do not have it (Signal Processing toolbox
functions are still preferred).
* readneurolocs(): now reads two types of Neuroscan polar location files.
* spectopo(): uses Matlab pwelch(), units specified (10*log10(uV/Hz)
(thanks to Johannes Sarnthein).
* phasecoher(): now uses angle() instead of obsolete toolbox function
phase() (thanks to Chris Jetton).
* pop_importpres(): now uses Presentation fields from data file (instead
of stereotyped fields).
* pop_importevent(): internally reprogrammed.
* channel location database: added standard 10-10 and 10-20 System caps
in EEGLAB format
See: ftp://sccn.ucsd.edu/pub/locfiles/eeglab/
* loadcnt(): fixing event reading bug for 32-bit continuous Neuroscan
files (thanks to Jed Meltzer).
* readlocs(): if both spherical and 3-D Cartesian coordinates are
present, now uses spherical
by default and re-converts to 3-D Cartesian.
--
* Arnaud Delorme <http://www.sccn.ucsd.edu/%7Earno>, Ph.D.* , SCCN,
UCSD, San Diego, USA
*SCCN main page:* www.sccn.ucsd.edu <http://www.sccn.ucsd.edu/>
*EEGLAB main page:* www.sccn.ucsd.edu/eeglab/
<http://www.sccn.ucsd.edu/eeglab>
*EEGLAB documentation:* www.sccn.ucsd.edu/eeglab/eeglabdocs.html
<http://www.sccn.ucsd.edu/eeglab/eeglabdocs.html>
*EEGLAB FAQ page:* www.sccn.ucsd.edu/eeglab/eeglabfaq.html
<http://www.sccn.ucsd.edu/eeglab/eeglabfaq.html>
*EEGLAB mailing lists:* www.sccn.ucsd.edu/eeglab/eeglabmail.html
<http://www.sccn.ucsd.edu/eeglab/eeglabmail.html>
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