ECG Database Applications Guide Table of Contents


rdsamp - read DB signal files


rdsamp -r record [ options ... ]


rdsamp reads signal files for the specified record and writes the samples as decimal numbers on the standard output. If no options are provided, rdsamp starts at the beginning of the record and prints all samples. Each line of output contains the sample number and samples from each signal, beginning with channel 0, separated by tabs.

Options include:

-f time
Begin at the specified time. By default, rdsamp starts at the beginning of the record.
Print a usage summary.
Read the signal files in high-resolution mode (default: standard mode). These modes are identical for ordinary records. For multifrequency records, the standard decimation of oversampled signals to the frame rate is suppressed in high-resolution mode (rather, all other signals are resampled at the highest sampling frequency).
Print times in seconds and milliseconds, and values in physical units. By default, rdsamp prints times in sample intervals and values in A/D units.
-s signal-list
Print only the signals named in the signal-list (one or more input signal numbers, separated by spaces; default: print all signals). This option may be used to re-order or duplicate signals.
-t time
Stop at the specified time. By default, rdsamp stops at the end of the record.
Print column headings.

The shell variable DB should be set and exported (see setdb(1) ).


The first edition of the MIT-BIH Arrhythmia Database CD-ROM, the first and second editions of the European ST-T Database CD-ROM, and the first edition of the MIT-BIH Polysomnographic Database CD-ROM contain versions of rdsamp that use an older command syntax (still supported by the current version but not described here). Refer to bin.doc in the CD-ROM directory that contains rdsamp for further information.


rdann(1) , setdb(1) , wrsamp(1)

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