sampfreq - show sampling frequency for a record
sampfreq [ option
] record
This program shows the sampling frequency (in samples
per second per signal) for the specified record. A record may contain multiple
signals sampled at different frequencies; in this case, the signals are
stored in frames each containing at least one sample of each signal, and
(by default, if no option is specified) sampfreq shows the number of frames
per second. This is the number of samples per second returned for each
signal when the record is read using the WFDB library function getvec in
standard (low-resolution) mode; see rdsamp(1)
, for example.
If specified,
the option may be one of:
- -a
- List all signals in the record and their respective
sampling frequencies.
- -h
- Print a usage summary.
- -H
- Show the highest frequency
used for any signal in a multi-frequency record. This is the number of samples
per second returned by getvec when the record is read in high-resolution
mode; see rdsamp(1)
, for example.
It may be necessary to set
and export the shell variable WFDB (see setwfdb(1)
).
- record.hea
- header
file
rdsamp(1)
, setwfdb(1)
George B. Moody (george@mit.edu)
http://www.physionet.org/physiotools/wfdb/app/sampfreq.c
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