Power spectrum of inter-event intervals
spikespec [-F# -## -w# -i -o outfile -l# -x# -c# -V# -h] file(s)
Computes a power spectrum assuming that the data are the times of singular
events, e.g. heart beats. With the flag -i
set, the data is taken to be inter-event intervals rather than event times.
If the event times are t(n), n=1,...,l, the spectrum is defined by
-F maximal frequency (2*l / total time)
-# number of frequencies (F* total time /2)
-w frequency resolution (0)
-i expect intervals rather than times
-l number of values to be read (all)
-x number of values to be skipped (0)
-c column to be read (1 or file,#)
-o output file name, just -o means file_sp
-V verbosity level (0 = only fatal errors)
-h show this message
| --- |
| \ -i 2 pi f t(n) |
S(f) = | | e |
| / |
| --- |
that is, the signal is taken to be a sum of delta functions at the t(n).
S(f) is computed for # frequencies between 0
and -F . The result is binned down to a
frequency resolution -w .
Output file file_ss (frequency, spectrum).
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