FT_SPIKEDETECTION
Note that this reference documentation is identical to the help that is displayed in MATLAB when you type “help ft_spikedetection”.
FT_SPIKEDETECTION reads continuous data from disk and detects spikes. The function writes the unsorted spike waveforms to disk in another file. Use as cfg = ft_spikedetection(cfg) The configuration options can contain cfg.dataset = string with the input dataset cfg.output = string with the output dataset (default is determined automatic) cfg.dataformat = string with the output dataset format, see FT_WRITE_FCDC_SPIKE cfg.method = string with the method to use, can be 'all', 'zthresh', 'ztrig', 'flank' cfg.interactive = 'yes' or 'no' cfg.timestampdefinition = 'orig' or 'sample' The default is to process the full dataset. You can select a latency range with cfg.latency = [begin end], default is [0 inf] or you can specify multiple latency segments with cfg.latency = [b1 e1; b2 e2; ...] Specific settings for the zthresh spike detection method are cfg.zthresh.neg = negative threshold, e.g. -3 cfg.zthresh.pos = positive threshold, e.g. 3 cfg.zthresh.offset = number of samples before peak (default = 16) cfg.zthresh.mindist = mininum distance in samples between detected peaks Specific settings for the flank spike detection method are cfg.flank.value = positive or negative threshold cfg.flank.offset = number of samples before peak cfg.flank.ztransform = 'yes' or 'no' cfg.flank.mindist = mininum distance in samples between detected peaks Furthermore, the configuration can contain options for preprocessing cfg.preproc.lpfilter = 'no' or 'yes' lowpass filter cfg.preproc.hpfilter = 'no' or 'yes' highpass filter cfg.preproc.bpfilter = 'no' or 'yes' bandpass filter cfg.preproc.lnfilter = 'no' or 'yes' line noise removal using notch filter cfg.preproc.dftfilter = 'no' or 'yes' line noise removal using discrete fourier transform cfg.preproc.medianfilter = 'no' or 'yes' jump preserving median filter cfg.preproc.lpfreq = lowpass frequency in Hz cfg.preproc.hpfreq = highpass frequency in Hz cfg.preproc.bpfreq = bandpass frequency range, specified as [low high] in Hz cfg.preproc.lnfreq = line noise frequency in Hz, default 50Hz cfg.preproc.lpfiltord = lowpass filter order cfg.preproc.hpfiltord = highpass filter order cfg.preproc.bpfiltord = bandpass filter order cfg.preproc.lnfiltord = line noise notch filter order cfg.preproc.medianfiltord = length of median filter cfg.preproc.lpfilttype = digital filter type, 'but' (default) or 'fir' cfg.preproc.hpfilttype = digital filter type, 'but' (default) or 'fir' cfg.preproc.bpfilttype = digital filter type, 'but' (default) or 'fir' cfg.preproc.lpfiltdir = filter direction, 'twopass' (default) or 'onepass' cfg.preproc.hpfiltdir = filter direction, 'twopass' (default) or 'onepass' cfg.preproc.bpfiltdir = filter direction, 'twopass' (default) or 'onepass' cfg.preproc.detrend = 'no' or 'yes' cfg.preproc.demean = 'no' or 'yes' cfg.preproc.baselinewindow = [begin end] in seconds, the default is the complete trial cfg.preproc.hilbert = 'no' or 'yes' cfg.preproc.rectify = 'no' or 'yes'