Content-type: text/html 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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Time: 02:08:09 GMT, October 03, 2005