In common with all programs built using the WFDB library, WAVE finds its input files in any of the directories specified by the WFDB path (the value of the WFDB environment variable, if set, or a compiled-in default path as given in the WFDB library source file wfdblib.h otherwise; see the discussion of the database path in the WFDB Programmer's Guide for details). Verify that the sample record is accessible on the WFDB path using the command ``wfdbwhich 100s.hea''. If the response begins with
`100s.hea': not foundtype the command needed to initialize the database environment (item 2 from the worksheet).
In this exercise, you will use WAVE to examine record 100s, a sample record containing one minute of annotated two-channel ECG. Record 100s is distributed with all versions of WAVE and should be available on any WAVE host. Check that it is available by typing
rdsamp -r 100s -f 59.99; rdann -r 100s -a atr -f 59The output should be
21596 982 995 21597 978 989 21598 975 988 21599 975 989 0:59.508 21423 N 0 0 0If you do not obtain this output, see your system administrator.