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Each file contains the instantaneous power time courses at different recording sites during an ictal event. Recordings comprise the ictal epoch along with 60 seconds of pre- and post-ictal activity shown for comparison. Each seizure is represented in 5 different frequency bands. The filenames have the following structure: > "P1sz{**seizure-id**}_pw{**frequency-band**}" The parameter **seizure-id** ranges from 1 to 9 and the parameter **frequency-band** takes one of the following values: - **DTh**, delta-theta range (3–8 Hz). - **AB**, power in the alpha-beta range (8–20 Hz). - **G**, gamma range (20–70 Hz). - **HG**, high-gamma range (70–165 Hz). - **Broad**, broadband (3–165 Hz). The files can be opened using the Epylib python package ( import epylib as epy sz=1 bd='Broad' pw=epy.loadHDF5('power_hdf5/P1sz'+str(sz)+'_pw'+bd+'.hdf5') The function `epy.loadHDF5` returns a `MetaArray` object. `MetaArray` is a subclass of the numpy `ndarray` class with extended metadata functionality. The variable `pw` is a 2-D array, wherein each row contains the power time course of one channel in the specified frequency range. Additionally, the metadata is stored as attributes: pw.channels # number of channels pw.samples # number of time points pw.sampling # sampling rate pw.span # time span of the whole recording in seconds pw.subject # subject id pw.seizure # seizure id pw.filename # filename pw.channellabels # channel labels