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Man page of X-GEN
X-GEN
Section: X-GEN Commands (1)
Updated: April 2005
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NAME
X-GEN - expun
SYNOPSIS
expun
DESCRIPTION
"expun" offers an alternative to the standard method of flagging
observations for deletion from an X-GEN MULTIREF. Ordinarily the
flagging is applied directly in the "reject" application (or in "scalem");
but an alternative is to use the text output file of "reject", which
has the environment variable name DELETIONS. In this mode, we use "expun"
to apply the deletions specified in the DELETIONS file to the original
MULTIREF to write out a new MULTIREF with the appropriate observations flagged.
The purpose of this division of labor is to allow the user to manually
edit the DELETIONS file before applying it to the MULTIREF. The DELETIONS
file is a text file, and it's reasonably obvious to see how to add or
subtract observations from the list. If an observation is inserted into
the DELETIONS list that in fact isn't present in the MULTIREF, nothing terrible
happens.
Observations in a MULTIREF are marked as deletable by having the shift value
(a two-byte integer that is indicative of how far the reflection's scanning
angle is from the beginning of its data run) set to its negative.
Therefore an additional function of "expun" would be to undelete an already-
deleted observation.
REPORTING BUGS
Report bugs to Andy Howard at howard@iit.edu or 312-567-5881.
COPYRIGHT
Copyright © 2002, Illinois Institute of Technology.
See the file 'LICENSE' for information on usage and redistribution
of this file, and for a DISCLAIMER OF ALL WARRANTIES
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- REPORTING BUGS
-
- COPYRIGHT
-
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