The FRDAC function returns the access matrix
for a file. The syntax is:
R FRDAC TIENO {PASS}
TIENO is the tie number you used to tie or create
the file (or the tie number returned by APLX if you tied or created it using 0
instead of your own tie number). If you tied the file using a pass number, you must provide the same pass number, as the PASS parameter.
The explicit result is the file's current N by 3 access
matrix (which may be empty). See the
description of FSTAC for
details.