FT_REALTIME_SIGNALRECORDER
Note that this reference documentation is identical to the help that is displayed in MATLAB when you type “help ft_realtime_signalrecorder”.
FT_REALTIME_SIGNALRECORDER is an example realtime application for recording of data that is streaming to the buffer in real-time. It should work both for EEG and MEG. Use as ft_realtime_signalrecorder(cfg) with the following configuration options cfg.blocksize = number, size of the blocks/chuncks that are processed (default = 1 second) cfg.channel = cell-array, see FT_CHANNELSELECTION (default = 'all') cfg.bufferdata = whether to start on the 'first or 'last' data that is available (default = 'last') cfg.jumptoeof = whether to skip to the end of the stream/file at startup (default = 'yes') The source of the data, i.e. where it comes from, is configured as cfg.dataset = string or alternatively to obtain more low-level control as cfg.datafile = string cfg.headerfile = string cfg.eventfile = string cfg.dataformat = string, default is determined automatic cfg.headerformat = string, default is determined automatic cfg.eventformat = string, default is determined automatic The target for the data, i.e. where it goes to, is configured as cfg.export.dataset = string with the output file name cfg.export.dataformat = string describing the output file format, see FT_WRITE_DATA Some notes about skipping data and catching up with the data stream: cfg.jumptoeof='yes' causes the realtime function to jump to the end when the function _starts_. It causes all data acquired prior to starting the realtime function to be skipped. cfg.bufferdata='last' causes the realtime function to jump to the last available data while _running_. If the realtime loop is not fast enough, it causes some data to be dropped. If you want to skip all data that was acquired before you start the RT function, but don't want to miss any data that was acquired while the realtime function is started, then you should use jumptoeof=yes and bufferdata='first'. If you want to analyse data from a file, then you should use cfg.jumptoeof='no' and cfg.bufferdata='first'. To stop this realtime function, you will have have to press Ctrl-C.