Pages in the category "faq"
- Are the FieldTrip lectures available on video?
- Can I compare EEG channels between different electrode caps?
- Can I do combined EEG and MEG source reconstruction?
- Can I get an offline version of the documentation on the website?
- Can I organize my own FieldTrip workshop?
- Can I prevent "external" toolboxes from being added to my MATLAB path?
- Can I restrict the source reconstruction to the grey matter?
- Can I use FieldTrip without MATLAB license?
- Can I use Octave instead of MATLAB?
- Can I use the FieldTrip logo on my poster?
- Do I need to resample my data, and if so, how is this to be done?
- Does it make sense to subtract the ERP prior to time frequency analysis, to distinguish evoked from induced power?
- Does the FieldTrip realtime buffer only work with MATLAB?
- Frequently asked questions
- How are electrodes, magnetometers or gradiometers described?
- How are the different head and MRI coordinate systems defined?
- How are the Left and Right Pre-Auricular (LPA and RPA) points defined?
- How are the various MATLAB data structures defined?
- How can I anonymize data processed in FieldTrip?
- How can I anonymize or deidentify a BrainVision dataset?
- How can I anonymize or deidentify a CTF dataset?
- How can I anonymize or deidentify an anatomical MRI?
- How can I anonymize or deidentify DICOM files?
- How can I append the files of two separate recordings?
- How can I change the head localization in a CTF dataset?
- How can I check or decipher the sequence of triggers in my data?
- How can I check whether the grid that I have is aligned to the segmented volume and to the sensor gradiometer?
- How can I compile the mex files and command-line executable?
- How can I compile the mex files on 64-bit Windows?
- How can I compile the mex files on macOS?
- How can I compute inter-trial coherence?
- How can I consistently represent artifacts in my data?
- How can I convert an anatomical MRI from DICOM into CTF format?
- How can I convert one dataformat into an other?
- How can I deal with a discontinuous Neuralynx LFP recording?
- How can I debug my analysis script if a FieldTrip function gives an error?
- How can I define neighbouring sensors?
- How can I determine the anatomical label of a source or electrode?
- How can I determine the onset of an effect?
- How can I distribute a batch of jobs?
- How can I do time-frequency analysis on continuous data?
- How can I extend the reading functions with a new dataformat?
- How can I find out what eventvalues and eventtypes there are in my data?
- How can I fine-tune my BEM volume conduction model?
- How can I fix a corrupt CTF meg4 file?
- How can I fix a corrupt CTF res4 header file?
- How can I import my own data format?
- How can I inspect the electrode impedances of my data?
- How can I interpret the different types of padding in FieldTrip?
- How can I keep track of changes to the code?
- How can I map source locations onto an anatomical label in an atlas?
- How can I merge two datasets that were acquired simultaneously with different amplifiers?
- How can I monitor a subject's head position during a MEG session?
- How can I play back EEG/MEG and synchronous audio or video?
- How can I preprocess a dataset that is too large to fit into memory?
- How can I process continuous data without triggers?
- How can I read all channels from an EDF file that contains multiple sampling rates?
- How can I read corrupted (unsaved) CTF data?
- How can I read EGI mff data without the JVM?
- How can I rename channels in my data structure?
- How can I share my MEG data?
- How can I test for correlations between neuronal data and quantitative stimulus and behavioral variables?
- How can I test whether a behavioral measure is phasic?
- How can I transform trigger values from bits to decimal representation with a trialfun?
- How can I use my MacBook Pro for stimulus presentation in the MEG lab?
- How can I use the databrowser?
- How can I use the ivar, uvar, wvar and cvar options to precisely control the permutations?
- How can I visualize a localspheres volume conductor model?
- How can I visualize the different geometrical objects that are needed for forward and inverse computations?
- How can I visualize the neuromag head position indicator coils?
- How do homogenous coordinate transformation matrices work?
- How do I construct a layout file for the plotting functions?
- How do I install the OpenMEEG binaries
- How do I prevent FieldTrip from printing the time and memory after each function call?
- How does a difference in trial numbers per condition affect my statistical test
- How does ft_prepare_neighbours work?
- How does MTMCONVOL work?
- How does the CTF higher-order gradiometer work?
- How does the filter padding in preprocessing work?
- How fast is the FieldTrip buffer for realtime data streaming?
- How is anatomical, functional or statistical "volume data" described?
- How is the segmentation defined?
- How many lines of code does FieldTrip consist of?
- How many people are subscribed to the email discussion list?
- How NOT to interpret results from a cluster-based permutation test
- How should I get started with the FieldTrip realtime buffer?
- How should I prepare for the upcoming FieldTrip workshop?
- How should I refer to FieldTrip in my publication?
- How should I report the positions of the fiducial points on the head?
- How should I share example data with the email list or developers?
- How should I specify the coordinate systems in a BIDS dataset?
- How should I specify the fiducials for electrode realignment?
- How to ask good questions to the community?
- How to change the MRI orientation, the voxel size or the field-of-view?
- How to compile MATLAB code into stand-alone executables?
- How to coregister an anatomical MRI with the gradiometer or electrode positions?
- How to get started with distributed computing using qsub?
- How to get started with the MATLAB distributed computing toolbox?
- How to interpret the sign of the phase slope index?
- How to select the correct SPM toolbox?
- How to test an interaction effect using cluster-based permutation tests?
- I am getting strange artifacts in figures that use opacity
- I am having problems downloading
- I am having problems printing figures that use opacity
- I am having problems reading the CTF .hc headcoordinates file
- I am working at the Donders, should I also download FieldTrip?
- I have problems reading in neuroscan .cnt files. How can I fix this?
- I used ICA on my MEG data from before 2012 and now FieldTrip crashes, why is that?
- I used to work with trl-matrices that have more than 3 columns. Why is this not supported anymore?
- In what way can frequency domain data be represented in FieldTrip?
- Installation and setting up the path
- Is it good or bad to have dipole locations outside of the brain for which the source reconstruction is computed?
- Is it important to have accurate measurements of electrode locations for EEG source reconstruction?
- Is it OK for vertices/dipoles to stick out of the volume conductor?
- Is it possible to keep track of trial-specific information in my analysis pipeline?
- MATLAB complains about a missing or invalid mex file, what should I do?
- MATLAB complains that mexmaci64 cannot be opened because the developer cannot be verified
- MATLAB does not see the functions in the "private" directory
- MATLAB version 7.3 (2006b) crashes when I try to do ...
- My MRI is upside down, is this a problem?
- Reading is slow, can I write my raw data to a more efficient file format?
- Replacements for functions from MathWorks toolboxes
- Should I rereference prior to or after ICA for artifact removal?
- Should I use a Polhemus or a Structure Sensor to record electrode positions?
- Should I use t or F values for cluster-based permutation tests?
- The databrowser crashes and destroys the whole MATLAB session, how can I resolve this?
- What are the differences between the old and the new implementation of 'mtmconvol' in ft_freqanalysis?
- What are the differences between the old and the new implementation of 'mtmftt' in ft_freqanalysis?
- What are the differences between the old and the new implementation of 'wavelet' (formerly 'wltconvol') in ft_freqanalysis?
- What are the different approaches I can take for distributed computing?
- What are the different Neuromag/Elekta/Megin and Yokogawa layouts good for?
- What are the MATLAB and external requirements?
- What are the MATLAB requirements for using FieldTrip?
- What are the units of the data and of the derived results?
- What convention is used to define absolute phase in 'mtmconvol', 'wavelet' and 'mtmfft'?
- What dataformats are supported?
- What does "padding not sufficient for requested frequency resolution" mean?
- What does a typical call to a FieldTrip function look like?
- What is a good way to save images for later processing in other software?
- What is meant by time-frequency trade off?
- What is the conductivity of the brain, CSF, skull and skin tissue?
- What is the difference between coherence and coherency?
- What is the difference between the ACPC, MNI, SPM and TAL coordinate systems?
- What is the format of the layout file which is used for plotting?
- What is the idea behind statistical inference at the second-level?
- What is the plotting convention for anatomical MRIs?
- What is the relation between "events" (such as triggers) and "trials"?
- What kind of cable do I need for a serial port connection between two computers?
- What kind of filters can I apply to my data?
- What kind of volume conduction models of the head (head models) are implemented?
- What material is used for the flexible MEG headcasts?
- Where can I find open access MEG/EEG data?
- Where can I find the dipoli command-line executable?
- Where is the anterior commissure?
- Which colormaps are supported?
- Which datasets are used in the documentation and where are they used?
- Which external toolboxes are used by FieldTrip?
- Which methodological details should I report in an EEG/MEG manuscript?
- Which version of FieldTrip should I download?
- Which version of FieldTrip should I download?
- Why am I not allowed to post to the discussion list?
- Why am I not getting integer frequencies?
- Why am I not receiving emails from the discussion list?
- Why am I receiving warnings about too many bouncing emails?
- Why are so many of the interesting functions in the private directories?
- Why are the fileio functions stateless, does the fseek not make them very slow?
- Why are there multiple neighbour templates for the Neuromag306 system?
- Why does my anatomical MRI show upside-down when plotting it with ft_sourceplot?
- Why does my EEG headmodel look funny?
- Why does my ICA output contain complex numbers?
- Why does my output.freq not match my cfg.foi when using 'mtmconvol' in ft_freqanalysis?
- Why does my output.freq not match my cfg.foi when using 'mtmfft' in ft_freqanalysis
- Why does my output.freq not match my cfg.foi when using 'wavelet' (formerly 'wltconvol') in ft_freqanalysis?
- Why does my TFR contain NaNs?
- Why does my TFR look strange (part I, demeaning)?
- Why does my TFR look strange (part II, detrending)?
- Why is FieldTrip developed separately from EEGLAB?
- Why is my message rejected from the email discussion list?
- Why is the largest peak in the spectrum at the frequency which is 1/segment length?
- Why is the source model deformed or incorrectly aligned after warping template?
- Why is there a residual 50Hz line-noise component after applying a DFT filter?
- Why is there a rim around the brain for which the source reconstruction is not computed?
- Why should I set continuous to yes for CTF data?
- Why should I use an average reference for EEG source reconstruction?
- Why should I use the cfg.correcttail option when using statistics_montecarlo?
- Why was FieldTrip maintained in SVN and not in Git?