ECG Database Applications Guide
Table of Contents
snip - copy an excerpt of a DB record
snip -i input-record -n
new-record [ options ]
snip copies the signal files (and, optionally,
annotation files) of the specified input-record, and generates a header
file, thereby creating the specified new-record. snip is usually used to
extract an excerpt of its input-record, using the -f and -t options (see
below) to specify the segment to be copied.
The program xform(1)
can also
perform this task, but offers additional flexibility (it can scale the
signals, resample them at a different frequency, rearrange them, select
subsets of them, or reformat them); snip is faster than xform, however.
Options are:
- -a annotator
- Copy the specified annotator as well as the signal
files. Two or more annotator arguments, separated by spaces, can follow
-a. An annotator supplied via the standard input may be specified using
`-', but only immediately after `-a'; in this case only, annotations are copied
to the standard output.
- -f time
- Begin at the specified time in the input
record (default: the beginning of the record).
- -h
- Print a usage summary.
- -t time
- Process until the specified time in the input record (default:
continue to the end of the record).
The shell variable DB should be set
and exported (see setdb(1)
).
- new-record.dat
- output signal file
- header.new-record
- output header file (under MS-DOS, new-record.hea)
- annotator.new-record
- output
annotation file (under MS-DOS, new-record.ann)
xform(1)
, setdb(1)
Table of Contents