Opening the binary data

[matinsaba]

I want to get the data from specific channels in binary data like the way that open_ephys format lists the channels. Can anyone help me with that ?

[jsiegle]

Are you loading the data in Matlab (load_open_ephys_binary.m) or Python (Python3/Binary.py)? Either way, the data will be loaded as a matrix with dimensions of samples x channels. Selecting one value in the second dimension (e.g. data[:,1] in Python) will return data for a specific channel.

[Alkohost]

Would be nice to have a Matlab reader with optional loading of the selected channels if a data size is too huge and a memory is not enough. Has anyone solved this problem?

[aacuevas]

For big datasets the MATLAB reader has an optional 'mmap' option that loads the file in memory mapped mode. In this mode the file is not loaded to memory in one go, but chunks are loaded and unloaded automatically by MATLAB as needed. In this case, it would be possible to load the data in this mode and just copy the required channels into a different array.

See help load_open_ephys_binary for more info on this mode.

[Alkohost]

Thanks, this is a good way.